Archive for December, 2012

Evidence Contradicts Idea That Starvation Caused Saber-Tooth Cat Extinction

In the period just before they went extinct, the American lions and saber-toothed cats that roamed North America in the late Pleistocene were living well off the fat of the land. That is the conclusion of the latest study of the microscopic wear patterns on the teeth of these great cats recovered from the La […]

Multicellular Fossils Point to Life On Land ?

Ancient multicellular fossils long thought to be ancestors of early marine life are remnants of land-dwelling lichen or other microbial colonies, says University of Oregon scientist Gregory J. Retallack, who has been studying fossil soils of South Australia. Ediacaran (pronounced EDI-akran) fossils date to 542-635 million years ago. They’ve been considered fossil jellyfish, worms and […]

First Freshwater Mosasaur Discovered

A new mosasaur species discovered in Hungary is the first known example of this group of scaled reptiles to have lived in freshwater river environments similar to modern freshwater dolphins. The research is published Dec. 19 in the open-access journal PLOS ONE by Laszlo Makadi from the Hungarian Natural History Museum, Hungary and colleagues from […]

Evolution of Early Life:Paleo-Ocean Chemistry answers

A research team led by biogeochemists at the University of California, Riverside has tested a popular hypothesis in paleo-ocean chemistry, and proved it false. The fossil record indicates that eukaryotes — single-celled and multicellular organisms with more complex cellular structures compared to prokaryotes, such as bacteria — show limited morphological and functional diversity before 800-600 […]

New Study Sheds Light On Dinosaur Size

Dinosaurs were not only the largest animals to roam the Earth — they also had a greater number of larger species compared to all other back-boned animals — scientists suggest in a new paper published in the journalĀ PLOS ONE. The researchers, from Queen Mary, University of London, compared the size of the femur bone of […]

Desert fossil discovery reveals surprises

A solar energy company planning a development in eastern Riverside County has discovered a rare Mojave Desert treasure-trove of Ice Age fossils, including a clutch of desert tortoise eggs believed to be the first found in California. Paleontologists are buzzing about pieces of ivory from a mammoth tusk, the teeth of ancient horses and other […]

Pauline avibella

Fossils discovered of 425-million-year-old tiny shrimp-like creatures are of a species new to science, say experts. Found in Herefordshire, the invertebrates were preserved by volcanic ash when the UK had a subtropical climate. The fossils show the animals’ shells and soft tissues, such as eyes and limbs, the Leicester experts say. Prof David Siveter said […]

fossil bones with bug bites

Paleontologists have long been perplexed by dinosaur fossils with missing pieces – sets of teeth without a jaw bone, bones that are pitted and grooved, even bones that are half gone. Now a Brigham Young University study identifies a culprit: ancient insects that munched on dinosaur bones. BYU professor Brooks Britt will publish his study […]

Earliest evidence for reptiles

Newly discovered fossilised footprints provide the earliest evidence yet for the evolution of reptiles – a major event in the history of life. They are 315 million years old, making reptiles up to 3 million years older than previously thought. The footprints were discovered by Dr Howard Falcon-Lang from the University of Bristol in sea […]

200-million-year-old fossil of leech found

Move overĀ amber. When it comes to preserving soft-bodied animals through the ages, there’s a newcomer in town: fossilised leech “cocoons”. The cocoons are secreted by many leech and worm species as mucous egg cases that harden and often fossilise. Almost two decades ago, Norwegian scientists found a perfectly preserved nematode worm embedded in the wall […]