Posts Tagged ‘Russel T Sajeev’

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 over 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 […]

Nyasasaurus parringtoni:Mysterious fossil identified

Researchers have found what could be the earliest known dinosaur to walk the earth lurking in the corridors of London’s Natural History Museum. A mysterious fossil specimen that has been in the museum’s collection for decades has now been identified as most likely coming from a dinosaur that lived about 245 million years ago – […]

Nysasaurus parringtoni: world’s oldest dinosaur lived 245 million years ago ?

A creature about the size of a Labrador retriever with a 1.5-metre-long tail could be the earliest-known dinosaur to have walked the Earth, according to scientists.Research published Wednesday in the journal Biology Letters describes a set of fossilized bones from Tanzania that predates all other discoveries by 10 to 15 million years. The new findings […]

Fossils and Genes Brought Together to Piece Together Evolutionary History

Paleontology, with its rocks and fossils, seems far removed from the world of developmental genetics, with its petri dishes and embryos. Whereas paleontology strives to determine “What happened in evolution?,” developmental genetics uses gene control in embryos to try to answer “How did it happen?” Combined, the two approaches can lead to remarkable insights that […]

Holes in fossil bones reveal dinosaur activity

New research from the University of Adelaide has added to the debate about whether dinosaurs were cold-blooded and sluggish or warm-blooded and active. Professor Roger Seymour from the University’s School of Earth & Environmental Sciences has applied the latest theories of human and animal anatomy and physiology to provide insight into the lives of dinosaurs. The results will be published […]

Presence of Magnesium oxide: From Earth to super-Earth

The mantles of Earth and other rocky planets are rich in magnesium and oxygen. Due to its simplicity, the mineral magnesium oxide is a good model for studying the nature of planetary interiors. New work from a team led by Carnegie’s Stewart McWilliams studied how magnesium oxide behaves under the extreme conditions deep within planets […]

Solving a magma mystery

Oceanic crust covers two-thirds of the Earth’s solid surface, but scientists still don’t entirely understand the process by which it is made. Analysis of more than 600 samples of oceanic crust by a team including Carnegie’s Frances Jenner reveals a systemic pattern that alters long-held beliefs about how this process works, explaining a crucial step […]

What happens when the modern evolutionary theory of punctuated equilibrium collides with the older theory of mosaic evolution?

What happens when the modern evolutionary theory of punctuated equilibrium collides with the older theory of mosaic evolution? Part of the answer comes from a new, wide-ranging study by paleobiologists Melanie J Hopkins at the Museum fuer Naturkunde Berlin and Scott Lidgard at the Field Museum in Chicago. Their results are published this week in […]

Dinosaurs’ Role in Evolution of Bird Flight

A new study looking at the structure of feathers in bird-like dinosaurs has shed light on one of nature’s most remarkable inventions — how flight might have evolved. Academics at the Universities of Bristol, Yale and Calgary have shown that prehistoric birds had a much more primitive version of the wings we see today, with […]