#trilobites — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #trilobites, aggregated by home.social.
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UCL student Yasemin visited us today to study and photograph some trilobites in our fossil collection. She is looking at variation within the Silurian species Calymene, better known as the 'Dudley Bug'. We have some lovely examples on display and plenty more in store.
#NottNatHist #Museum #WollatonHall #fossils #paleontology #trilobites
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UCL student Yasemin visited us today to study and photograph some trilobites in our fossil collection. She is looking at variation within the Silurian species Calymene, better known as the 'Dudley Bug'. We have some lovely examples on display and plenty more in store.
#NottNatHist #Museum #WollatonHall #fossils #paleontology #trilobites
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UCL student Yasemin visited us today to study and photograph some trilobites in our fossil collection. She is looking at variation within the Silurian species Calymene, better known as the 'Dudley Bug'. We have some lovely examples on display and plenty more in store.
#NottNatHist #Museum #WollatonHall #fossils #paleontology #trilobites
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UCL student Yasemin visited us today to study and photograph some trilobites in our fossil collection. She is looking at variation within the Silurian species Calymene, better known as the 'Dudley Bug'. We have some lovely examples on display and plenty more in store.
#NottNatHist #Museum #WollatonHall #fossils #paleontology #trilobites
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The Most Successful Lineage to Go Extinct | Lindsay Nikole
#LindsayNikole #biology #evolution #trilobites -
The Most Successful Lineage to Go Extinct | Lindsay Nikole
#LindsayNikole #biology #evolution #trilobites -
The Most Successful Lineage to Go Extinct | Lindsay Nikole
#LindsayNikole #biology #evolution #trilobites -
The Most Successful Lineage to Go Extinct | Lindsay Nikole
#LindsayNikole #biology #evolution #trilobites -
RE: https://dmv.community/@jcrabapple/116873936921214929
more about #trilobites' eyes
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RE: https://dmv.community/@jcrabapple/116873936921214929
more about #trilobites' eyes
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RE: https://dmv.community/@jcrabapple/116873936921214929
more about #trilobites' eyes
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RE: https://dmv.community/@jcrabapple/116873936921214929
more about #trilobites' eyes
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Trilobites saw the world through lenses made of actual rock - and solved an optical problem 400 million years before humans did.
Their eyes were built from calcite, the same mineral in limestone and marble. Every other animal that ever lived uses soft protein lenses. Only trilobites evolved image-forming eyes from a hard, brittle crystal.
Here's the wild part: calcite is birefringent, meaning it splits light into two rays (double vision). Trilobites solved this by perfectly orienting each crystal so light traveled along the one axis where birefringence doesn't happen. They also exploited calcite's high refractive index (1.66 vs ~1.38 for our eyes), which works far better underwater where organic lenses struggle.
Some phacopid species went further - they grew a double-lens system with a magnesium-rich inner layer that eliminated spherical aberration. That's the same optical trick Huygens worked out in the 1600s. Evolution cracked it ~400 million years earlier.
Source: Towe (1973), Science - https://www.science.org/doi/10.1126/science.179.4077.1007
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Trilobites saw the world through lenses made of actual rock - and solved an optical problem 400 million years before humans did.
Their eyes were built from calcite, the same mineral in limestone and marble. Every other animal that ever lived uses soft protein lenses. Only trilobites evolved image-forming eyes from a hard, brittle crystal.
Here's the wild part: calcite is birefringent, meaning it splits light into two rays (double vision). Trilobites solved this by perfectly orienting each crystal so light traveled along the one axis where birefringence doesn't happen. They also exploited calcite's high refractive index (1.66 vs ~1.38 for our eyes), which works far better underwater where organic lenses struggle.
Some phacopid species went further - they grew a double-lens system with a magnesium-rich inner layer that eliminated spherical aberration. That's the same optical trick Huygens worked out in the 1600s. Evolution cracked it ~400 million years earlier.
Source: Towe (1973), Science - https://www.science.org/doi/10.1126/science.179.4077.1007
-
Trilobites saw the world through lenses made of actual rock - and solved an optical problem 400 million years before humans did.
Their eyes were built from calcite, the same mineral in limestone and marble. Every other animal that ever lived uses soft protein lenses. Only trilobites evolved image-forming eyes from a hard, brittle crystal.
Here's the wild part: calcite is birefringent, meaning it splits light into two rays (double vision). Trilobites solved this by perfectly orienting each crystal so light traveled along the one axis where birefringence doesn't happen. They also exploited calcite's high refractive index (1.66 vs ~1.38 for our eyes), which works far better underwater where organic lenses struggle.
Some phacopid species went further - they grew a double-lens system with a magnesium-rich inner layer that eliminated spherical aberration. That's the same optical trick Huygens worked out in the 1600s. Evolution cracked it ~400 million years earlier.
Source: Towe (1973), Science - https://www.science.org/doi/10.1126/science.179.4077.1007
-
Trilobites saw the world through lenses made of actual rock - and solved an optical problem 400 million years before humans did.
Their eyes were built from calcite, the same mineral in limestone and marble. Every other animal that ever lived uses soft protein lenses. Only trilobites evolved image-forming eyes from a hard, brittle crystal.
Here's the wild part: calcite is birefringent, meaning it splits light into two rays (double vision). Trilobites solved this by perfectly orienting each crystal so light traveled along the one axis where birefringence doesn't happen. They also exploited calcite's high refractive index (1.66 vs ~1.38 for our eyes), which works far better underwater where organic lenses struggle.
Some phacopid species went further - they grew a double-lens system with a magnesium-rich inner layer that eliminated spherical aberration. That's the same optical trick Huygens worked out in the 1600s. Evolution cracked it ~400 million years earlier.
Source: Towe (1973), Science - https://www.science.org/doi/10.1126/science.179.4077.1007
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Oxygen loss in the surface ocean does a number of biology. It's true now, and has been across geological history. Here's another example for that for trilobites during the SPICE event.
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Oxygen loss in the surface ocean does a number of biology. It's true now, and has been across geological history. Here's another example for that for trilobites during the SPICE event.
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Oxygen loss in the surface ocean does a number of biology. It's true now, and has been across geological history. Here's another example for that for trilobites during the SPICE event.
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Oxygen loss in the surface ocean does a number of biology. It's true now, and has been across geological history. Here's another example for that for trilobites during the SPICE event.
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Just posted my artwork appearance in the MoNA auction catalog and the exhibition continues through May 31 when final bidding will take place. This is The Book of Shadows: turquoise kootenia, an image from the Burgess Shale in British Columbia near Field. This specimen, kootenia burgessensis, was the design for the relief plate to make resist images with acrylic medium (matte).
#art #auction #MoNA #fossils #trilobites -
Just posted my artwork appearance in the MoNA auction catalog and the exhibition continues through May 31 when final bidding will take place. This is The Book of Shadows: turquoise kootenia, an image from the Burgess Shale in British Columbia near Field. This specimen, kootenia burgessensis, was the design for the relief plate to make resist images with acrylic medium (matte).
#art #auction #MoNA #fossils #trilobites -
Just posted my artwork appearance in the MoNA auction catalog and the exhibition continues through May 31 when final bidding will take place. This is The Book of Shadows: turquoise kootenia, an image from the Burgess Shale in British Columbia near Field. This specimen, kootenia burgessensis, was the design for the relief plate to make resist images with acrylic medium (matte).
#art #auction #MoNA #fossils #trilobites -
Just posted my artwork appearance in the MoNA auction catalog and the exhibition continues through May 31 when final bidding will take place. This is The Book of Shadows: turquoise kootenia, an image from the Burgess Shale in British Columbia near Field. This specimen, kootenia burgessensis, was the design for the relief plate to make resist images with acrylic medium (matte).
#art #auction #MoNA #fossils #trilobites -
💎👁️ Imagine seeing the world through eyes made of...stone?
Scientists studying #trilobites from hundreds of millions of years ago found that these ancient marine #animals used lenses made of solid calcite #crystal to navigate the #ocean floor.
#science #evolution #paleontology #biology #history #nature #prehistoric
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💎👁️ Imagine seeing the world through eyes made of...stone?
Scientists studying #trilobites from hundreds of millions of years ago found that these ancient marine #animals used lenses made of solid calcite #crystal to navigate the #ocean floor.
#science #evolution #paleontology #biology #history #nature #prehistoric
-
💎👁️ Imagine seeing the world through eyes made of...stone?
Scientists studying #trilobites from hundreds of millions of years ago found that these ancient marine #animals used lenses made of solid calcite #crystal to navigate the #ocean floor.
#science #evolution #paleontology #biology #history #nature #prehistoric
-
💎👁️ Imagine seeing the world through eyes made of...stone?
Scientists studying #trilobites from hundreds of millions of years ago found that these ancient marine #animals used lenses made of solid calcite #crystal to navigate the #ocean floor.
#science #evolution #paleontology #biology #history #nature #prehistoric
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#Trilobites were primeval #arthropods, still unknown whether they belong to the ancestor lineage of #Chelicerata or all #Euarthropada. Besides their body segmentation, they possess #compoundeyes. #Asaphus #kowalewskii lived in the Ordovician and had #stalkedeyes, allowing it an overview of its surroundings even when covered with sediment.
©#StefanFWirthI seriously depend on support, buy me a coffee
https://ko-fi.com/sfwirthReading
B.Schoenemann (2021)
https://doi.org/10.1016/j.asd.2021.101032Pics
©S.F.Wirth -
#Trilobites were primeval #arthropods, still unknown whether they belong to the ancestor lineage of #Chelicerata or all #Euarthropada. Besides their body segmentation, they possess #compoundeyes. #Asaphus #kowalewskii lived in the Ordovician and had #stalkedeyes, allowing it an overview of its surroundings even when covered with sediment.
©#StefanFWirthI seriously depend on support, buy me a coffee
https://ko-fi.com/sfwirthReading
B.Schoenemann (2021)
https://doi.org/10.1016/j.asd.2021.101032Pics
©S.F.Wirth -
#Trilobites were primeval #arthropods, still unknown whether they belong to the ancestor lineage of #Chelicerata or all #Euarthropada. Besides their body segmentation, they possess #compoundeyes. #Asaphus #kowalewskii lived in the Ordovician and had #stalkedeyes, allowing it an overview of its surroundings even when covered with sediment.
©#StefanFWirthI seriously depend on support, buy me a coffee
https://ko-fi.com/sfwirthReading
B.Schoenemann (2021)
https://doi.org/10.1016/j.asd.2021.101032Pics
©S.F.Wirth -
#Trilobites were primeval #arthropods, still unknown whether they belong to the ancestor lineage of #Chelicerata or all #Euarthropada. Besides their body segmentation, they possess #compoundeyes. #Asaphus #kowalewskii lived in the Ordovician and had #stalkedeyes, allowing it an overview of its surroundings even when covered with sediment.
©#StefanFWirthI seriously depend on support, buy me a coffee
https://ko-fi.com/sfwirthReading
B.Schoenemann (2021)
https://doi.org/10.1016/j.asd.2021.101032Pics
©S.F.Wirth -
Welcome to Trilobite Tuesday! Pictured is Asaphus kowalewski. This 450-million-year-old species stands apart from other trilobites with its eyes perched atop 2-in- (5-cm-) long stalks. To some, Asaphus kowalewski may look like an animal from a distant galaxy!
@AMNH #globalmuseum #fossils #trilobites -
Welcome to Trilobite Tuesday! Pictured is Asaphus kowalewski. This 450-million-year-old species stands apart from other trilobites with its eyes perched atop 2-in- (5-cm-) long stalks. To some, Asaphus kowalewski may look like an animal from a distant galaxy!
@AMNH #globalmuseum #fossils #trilobites -
Welcome to Trilobite Tuesday! Pictured is Asaphus kowalewski. This 450-million-year-old species stands apart from other trilobites with its eyes perched atop 2-in- (5-cm-) long stalks. To some, Asaphus kowalewski may look like an animal from a distant galaxy!
@AMNH #globalmuseum #fossils #trilobites -
Welcome to Trilobite Tuesday! Pictured is Asaphus kowalewski. This 450-million-year-old species stands apart from other trilobites with its eyes perched atop 2-in- (5-cm-) long stalks. To some, Asaphus kowalewski may look like an animal from a distant galaxy!
@AMNH #globalmuseum #fossils #trilobites -
80 years ago today, the late #RichardFortey was born. Read all about him in A Curious Boy, a bewitching memoir that tells of his early years and shows the power of curiosity in shaping his life.
https://inquisitivebiologist.com/2021/07/30/book-review-a-curious-boy-the-making-of-a-scientist/#Books #BookReview #Bookstodon #Fossils #Paleontology #Palaeontology #Trilobites #Scicomm
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80 years ago today, the late #RichardFortey was born. Read all about him in A Curious Boy, a bewitching memoir that tells of his early years and shows the power of curiosity in shaping his life.
https://inquisitivebiologist.com/2021/07/30/book-review-a-curious-boy-the-making-of-a-scientist/#Books #BookReview #Bookstodon #Fossils #Paleontology #Palaeontology #Trilobites #Scicomm
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80 years ago today, the late #RichardFortey was born. Read all about him in A Curious Boy, a bewitching memoir that tells of his early years and shows the power of curiosity in shaping his life.
https://inquisitivebiologist.com/2021/07/30/book-review-a-curious-boy-the-making-of-a-scientist/#Books #BookReview #Bookstodon #Fossils #Paleontology #Palaeontology #Trilobites #Scicomm
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80 years ago today, the late #RichardFortey was born. Read all about him in A Curious Boy, a bewitching memoir that tells of his early years and shows the power of curiosity in shaping his life.
https://inquisitivebiologist.com/2021/07/30/book-review-a-curious-boy-the-making-of-a-scientist/#Books #BookReview #Bookstodon #Fossils #Paleontology #Palaeontology #Trilobites #Scicomm
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Pictured is the Lower Cambrian Bristolia insolens—distinguished by the genal spines that emerge from its head. While specimens with disarticulated head shields are relatively common finds throughout the Western United States, complete examples are rare.
American Museum of Natural History
@AMNH #globalmuseum #fossils #trilobites -
Pictured is the Lower Cambrian Bristolia insolens—distinguished by the genal spines that emerge from its head. While specimens with disarticulated head shields are relatively common finds throughout the Western United States, complete examples are rare.
American Museum of Natural History
@AMNH #globalmuseum #fossils #trilobites -
Pictured is the Lower Cambrian Bristolia insolens—distinguished by the genal spines that emerge from its head. While specimens with disarticulated head shields are relatively common finds throughout the Western United States, complete examples are rare.
American Museum of Natural History
@AMNH #globalmuseum #fossils #trilobites -
Pictured is the Lower Cambrian Bristolia insolens—distinguished by the genal spines that emerge from its head. While specimens with disarticulated head shields are relatively common finds throughout the Western United States, complete examples are rare.
American Museum of Natural History
@AMNH #globalmuseum #fossils #trilobites -
Pictured is a 430 million-year-old Silurian Dalmanites caudatus from England. This 2.5-in- (6.4-cm-) long specimen was preserved in rock that, when carefully opened, revealed positive and negative splits! Notice that this trilobite is slightly disarticulated? A small brachiopod shell became wedged between the trilobite's head and body, causing them to separate.
via amnhnyc
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Pictured is a 430 million-year-old Silurian Dalmanites caudatus from England. This 2.5-in- (6.4-cm-) long specimen was preserved in rock that, when carefully opened, revealed positive and negative splits! Notice that this trilobite is slightly disarticulated? A small brachiopod shell became wedged between the trilobite's head and body, causing them to separate.
via amnhnyc
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Pictured is a 430 million-year-old Silurian Dalmanites caudatus from England. This 2.5-in- (6.4-cm-) long specimen was preserved in rock that, when carefully opened, revealed positive and negative splits! Notice that this trilobite is slightly disarticulated? A small brachiopod shell became wedged between the trilobite's head and body, causing them to separate.
via amnhnyc
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Pictured is a 430 million-year-old Silurian Dalmanites caudatus from England. This 2.5-in- (6.4-cm-) long specimen was preserved in rock that, when carefully opened, revealed positive and negative splits! Notice that this trilobite is slightly disarticulated? A small brachiopod shell became wedged between the trilobite's head and body, causing them to separate.
via amnhnyc
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https://www.europesays.com/es/335055/ Un ajuste al reloj molecular podría resolver un enigma de 30 millones de años #Ciencia #CienciaYTecnología #CienciaYtecnología #ES #España #EstrellaDeMar #evolución #fosiles #Geología #molécula #Paleontología #RelojAntiguo #Science #ScienceAndTechnology #ScienceAndTechnology #Spain #Technology #Tecnología #tiempo #trilobites
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Hello world! I haven't had much chance to get out in the field to dig this year, so here is a little Agnostida I found couple of years ago to prove I'm still alive! Sadly, trilobites remain extinct... still, the oceans are 80% unexplored... Agnostida species are found in lower Cambrian rocks (roughly 500 million years ago), but became rare in the Ordovician
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Hello world! I haven't had much chance to get out in the field to dig this year, so here is a little Agnostida I found couple of years ago to prove I'm still alive! Sadly, trilobites remain extinct... still, the oceans are 80% unexplored... Agnostida species are found in lower Cambrian rocks (roughly 500 million years ago), but became rare in the Ordovician
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Hello world! I haven't had much chance to get out in the field to dig this year, so here is a little Agnostida I found couple of years ago to prove I'm still alive! Sadly, trilobites remain extinct... still, the oceans are 80% unexplored... Agnostida species are found in lower Cambrian rocks (roughly 500 million years ago), but became rare in the Ordovician
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The high price found at the Montreal Gem and Mineral show (runs today until 5pm at the Palais des congrès).
Trilobites $2000
The dinosaur footprints are only $500 each!
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The high price found at the Montreal Gem and Mineral show (runs today until 5pm at the Palais des congrès).
Trilobites $2000
The dinosaur footprints are only $500 each!
-
The high price found at the Montreal Gem and Mineral show (runs today until 5pm at the Palais des congrès).
Trilobites $2000
The dinosaur footprints are only $500 each!
-
The high price found at the Montreal Gem and Mineral show (runs today until 5pm at the Palais des congrès).
Trilobites $2000
The dinosaur footprints are only $500 each!
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Trilobites were among the first animals to develop the ability to enroll for protection. With their thick calcite shells, an enrolled trilobite could present quite the daunting challenge for any predator seeking an easy meal. Scientists think trilobites first started using this defensive position some 520 million years ago, during the Lower Cambrian.
via amnhnyc
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Trilobites were among the first animals to develop the ability to enroll for protection. With their thick calcite shells, an enrolled trilobite could present quite the daunting challenge for any predator seeking an easy meal. Scientists think trilobites first started using this defensive position some 520 million years ago, during the Lower Cambrian.
via amnhnyc
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Trilobites were among the first animals to develop the ability to enroll for protection. With their thick calcite shells, an enrolled trilobite could present quite the daunting challenge for any predator seeking an easy meal. Scientists think trilobites first started using this defensive position some 520 million years ago, during the Lower Cambrian.
via amnhnyc
-
Trilobites were among the first animals to develop the ability to enroll for protection. With their thick calcite shells, an enrolled trilobite could present quite the daunting challenge for any predator seeking an easy meal. Scientists think trilobites first started using this defensive position some 520 million years ago, during the Lower Cambrian.
via amnhnyc