Tyrannosaurus rex wasn’t the only predatory dinosaur with small arms ROGER HARRIS/Getty Images/SCIENCE PHOTO LIBRARY With jaws like these, who needs big arms? A new analysis suggests dinosaurs like Tyrannosaurus rex had shrunken forelimbs because their massive, powerful heads became their primary tool for killing large prey, rendering their arms redundant. It is an evolutionary…
An artist’s impression of the Western Australian koala WA Museum Australia was once home to a second species of koala that lived only in the west of the continent, where it became extinct around 30,000 years ago. Today, there is only one koala species: Phascolarctos cinereus. It is found almost exclusively in eucalyptus forests in…
A reconstruction of the giant octopus Yohei Utsuki/Department of Earth and Planetary Sciences, Hokkaido University While dinosaurs ruled the land, Cretaceous oceans were home to a fierce and enormous octopus species that may have reached up to 19 metres in length, rivalling the size of the largest predators of the time, including sharks and marine…
One of the radiolarian fossils found inside the rock sample Courtesy of Jonathan Aitchison A tiny pellet of ancient rock, a mere half the size of a grain of rice, has yielded 20 microscopic fossils representing eight different species, including one that is entirely new to science. The discovery will enhance our understanding of the…
Artist’s reconstruction of the ancient ocean ecosystem preserved in the Jiangchuan biota Xiaodong Wang A huge and beautifully preserved suite of fossils discovered in China has cast doubt on the idea that complex life flourished dramatically during a rapid burst of evolution known as the Cambrian explosion. This event, spanning roughly 541 million to 513…
