Tag: evolution
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A new and large monofenestratan reveals the evolutionary transition to the pterodactyloid pterosaurs
Bruce and Rene Lauer have done it again… groundbreaking paleontological research. This time it’s a new pterosaur, Skiphosoura bavarica, from the Jurassic of Germany. The lead author is David Hone with Adam Fitch, Stefan Selzer, and the Lauers. The paper is Open Access and was published in the journal Current Biology.
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PBS Eons: What Happened To The Other Mesozoic Mammals?
There's a new episode of PBS Eons. This one is about the rise of modern mammals through the Cretaceous Period. In 2003, a fossil belonging to a mammaliaform was discovered in an ancient lakebed in what's now China. It was an almost complete skeleton the size of a platypus, a find that complicated the history…
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Fossil Reveals Oldest Known Tadpole That Grew to the Size of a Hot Dog
The New York Times Trilobite column has a story about what may be the largest tadpole species ever discovered. Notobatrachus, an ancient relative of modern frogs, lived around 161 million years ago in present-day Santa Cruz Province, Argentina. In 2020, a team of paleontologists from Argentina and China uncovered hundreds of adult fossils of Notobatrachus,…
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The Early Bird Got the Cicada, Then an Evolutionary Air War Started
The New York Times has a story about the evolution of flight in cicadas. New research published in the journal Science Advances found that cicadas likely evolved sleeker and more powerful wings due to the existential threat posed by birds. The researchers, including Chunpeng Xu a scientist at the Nanjing Institute of Geology and Palaeontology…
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PBS Eons: Could You Survive The Ordovician Period?
PBS Eons has another episode. This one is about the Ordovician period… could you survive the Earth's first mass extinction? The End-Ordovician Extinction was the first of the so-called ‘Big Five’ mass extinctions in the history of life on Earth – more than 80% of species in the oceans died out. But could you survive…
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Who’s the Dodo Now? A Famously Extinct Bird, Reconsidered.
The New York Times has an interesting article about the Dodo. The Dodo, Raphus cucullatus, was a flightless bird that lived on the island of Mauritius. It was about the size of a male turkey. The Dodo has long been seen as and inept animal that slid into extinction because it was too stupid to…
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PBS Eons: The Dinosaurs That Evolution Forgot
PBS has a new episode. This one is about the dinosaurs of the east coast of North America. North America was divided into two land masses by the Western Interior Seaway at the end of the Cretaceous about 100 to 66 million years ago. The east coast landmass is called Appalachia. Where are all the…
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PBS Eons: Could You Survive the Cambrian Explosion?
There's a new episode of PBS Eons. This one discusses whether you could survive in the Cambrian Period, some 500 million years ago. What would you eat? Could you breathe? In the ocean, the Cambrian Period was one of startling evolutionary innovations, but on land, it was barren, with no vegetation of any kind. In…
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PBS Eons: How the Himalayas Changed the World
There's a new episode of PBS Eons. This one explains how the Himalayan orogeny has affected the whole Earth over the last 50 million years. The rise of the Himalayas affected more than just the immediate area. Turns out, we may have them to thank for everything from the rise of giant flightless birds in…
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PBS Eons: Could You Survive The Devonian Period? (with Hank Green!)
PBS Eons has a new episode. This one dsicusses whether humas could survive in the Devonian Period. By the end of the Devonian Period, the land had exploded with plant life and ancient invertebrates. There was also Tiktaalik – one of the first known vertebrates able and willing to move from the water to land.…
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PBS Eons: How the Elephant got its Trunk
There’s a new episode PBS Eons. This one is about the evolution of a flexible trunk in elephants. Long-jawed proboscideans were doing pretty well for themselves. That is, until they were all rapidly replaced with proboscideans with long, flexible trunks instead: mammoths, mastodons, and our modern elephants. What suddenly made long jaws such a liability?…
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“I’ve Never Seen Anything Like It Before” – Unusual 550-Million-Year-Old Fossil Solves Paleontological Paradox
SciTechDaily has an interesting story about some of the earliest sponges. New research in the journal Nature suggests the earliest sponges did not have a mineral skeleton. Virginia Tech geobiologist Shuhai Xiao and his collaborators described an Ediacaran (550 million years old) sponge that had not evolved the ability to generate the hard needle-like structures,…
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Dinosaurs at Dusk: The Origins of Flight
Triton College has a few more showings of their “Dinosaurs at Dusk: The Origins of Flight” movie. Dinosaurs at Dusk is a whirlwind adventure back in time to explore the Earth when it was teeming with Pterosaurs and other feathered dinosaurs, the ancestors of modern-day birds. Join Lucy and her father as they fly through the…
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PBS Eons: The Mystery of South America’s False Horses
PBS Eons has a new episode on Youtube. This one is about the “false” horses of South America. How did the “false horse,” Thoatherium, and its relatives survive when their hoofed legs seemed to be adapted for an ecosystem that wouldn’t exist for another 12 million years?
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PBS Eons: When India Was An Island
PBS Eons has a new episode. This one is about the island isolation and how it affects evolution. We see that in the paleontological record of India. We need to talk about the biggest break-up of all-time: the break-up of the supercontinent Pangea, and how, ultimately, when India smashed back into Asia, it traded one…
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Fossil Hints That Jurassic Mammals Lived Slow and Died Old
A life reconstruction of Krusatodon. Not only are the specimens remarkably complete, but one belongs to a juvenile — making it the oldest known juvenile mammal fossil.Credit…Maija Karala The Trilobites column at the New York Times has a post about some unexpected discovery in some Jurassic mammals. Small mammals usually live fast and die young. …
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What defines a species? Inside the fierce debate that’s rocking biology to its core
Scientists have long debated whether the Florida panther is a North American cougar (Puma concolor couguar) or its own unique subspecies (P. c. coryi), ultimately settling on the former. The debate is part of a growing crisis in how scientists classify species. (Image credit: Maria Klos for Live Science) LiveScience has an interesting article about a…
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Fossil of Cambrian Long-Headed Chordate Unearthed in Utah
Nuucichthys rhynchocephalus was a pelagic organism with limited swimming abilities. Image credit: Franz Anthony. SciNews has an article about the discovery of the first chordate from the Great American Basin. Nuucichthys rhynchocephalus is a chordate and an animal that sheds light on early vertebrate evolution. N. rhynchocephalus lived during the Cambrian Period, about 505 million years ago. …
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Throwback Thursday #224: Stephen J. Gould at the Field Museum
This is Throwback Thursday #224. In these, we look back into the past at ESCONI specifically and Earth Science in general. If you have any contributions, (science, pictures, stories, etc …), please send them to esconi.info@gmail.com. Thanks! This post originally appeared as Flashback Friday #17 back in the run-up to ESCONI’s 70th anniversary. On Thursday,…
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A Mammoth First: 52,000-Year-Old DNA, in 3-D
The New York Times has a fascinating article about woolly mammoth DNA. A 52,000 year old chunk of mammoth skin from the permafrost of Siberia as been used to generate a three-dimensional model of their genome. The research was published recently in the journal Cell. The experimental method used in this study could be used…
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The Last Stand of the Woolly Mammoths
Mammoths remained on Wrangel Island, about 80 miles from the Siberian coast, for about 6,000 years after they vanished from the rest of Asia, Europe and North America.Credit…Beth Zaiken Carl Zimmer has an article about the last of the Woolly Mammoths over on the New York Times. A small population of mammoths on Wrangel Island…
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Did Australia’s extinct giant kangaroos hop or stride? Fossils suggest they walked on two legs
Mainland Australia’s biggest kangaroos went extinct 40,000 years ago, but scientists are still figuring out how these big beasts moved.(ABC TV: Catalyst) ABC News in Australia has an article about extinct giant kangaroos. Giant kangaroos like Procoptodon goliah lived in Australia until about 40,000 years ago. It weighed about 240 kilograms (> 500 lbs). Did…
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Was This Sea Creature Our Ancestor? Scientists Turn a Famous Fossil on its Head
The fossil of Pikaia, a creature that lived 508 million years ago and may have been a close relative of vertebrates.Credit…Mussini et al., Current Biology 2024 Carl Zimmer writes about Pikaia in his ORIGINS column in the New York Times. Discovered in 1909 by Charles Walcott in the Burgess Shale, Pikaia gracilens, which lived during…
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Researchers reconstruct genome of extinct species of flightless bird that once roamed the islands of New Zealand
Phys.org has a story about an extinct flightless bird from New Zealand. The genome of Anomalopteryx didiformis, the little bush moa, has been sequenced by a team of researchers that included scientists from Harvard University, the Max Planck Institute for Biological Intelligence, East Carolina University, Osaka University and the University of Toronto. A. didiformis went…
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New fossil brings us a step closer to unravelling the mystery of feather evolution
The Conversation has an interesting article about research into the evolution of feathers. Feathers were originally used for display and thermoregulation. It was only later when they were co-opted for flight. A new paper “Cellular structure of dinosaur scales reveals retention of reptile-type skin during the evolutionary transition of feathers”, published in the journal Nature,…
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PBS Eons: The Second Time Sponges Took Over The World
PBS Eons has a new episode. This one is about the Late Ordovician mass extinction and the animals that survived it. Was Sponge Bob king? Researchers have discovered a piece of a weird, but critical, time in the deep past…a time when the first-ever mass extinction may have turned Planet Earth into Sponge World.
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A New Tree of Flowering Plants? For Spring? Groundbreaking.
The New York Times’ Trilobites column has a story about work to understand how plants fit into the tree of life. New research detailed in the journal Nature suggests that more than 80% of major plant lineages evolved in a sudden burst during the Jurassic Period some 150 million years ago. This new study used…
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Newly-Discovered Species of Mammal Lived 610,000 Years after Dinosaur Extinction
SciNews has a story about the discovery of a new mammal from just after the end Cretaceous mass extinction. Militocodon lydae was found in the Corral Bluffs east of Colorado Spings, Colorado, within the Denver Basin. M. lydae was about the size of a chinchilla and likely omnivorous. It belongs to a group of mammals…
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ESCONI May 2024 General Meeting – Friday, May 10th, 2024 at 8:00 PM via Zoom – “Endless Forms Most Beautiful: Evolution of Development”
The ESCONI General Meeting for May 2024 will be held on May 10th, 2024 at 8:00 PM vis Zoom. The topic is “Endless Forms Most Beautiful: Evolution of Development” by Matteo Fabbri of the Field Museum. The details are below. Matteo Fabbri is an Evolutionary Biologist. Here’s his page. I had the privilege to be…
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PBS Eons: There’s No Single Cradle of Humankind
PBS Eons has a new episode. This one is about human origins. Where did our ancestors evolve? It would take decades for paleontologists to realize that maybe there wasn’t just one so-called “cradle of humankind,” and realize that maybe they’d been asking the wrong question all along.
