For some time now, there has been much debate about whether our beloved dinosaur, Triceratops, is a distinct species, or a younger version of a bigger ceratopsian, Torosaurus – the great Toroceratops’ debate. Proponents of both sides of the argument have made detailed quantitative and qualitative points, and there doesn’t really seem to have been any resolution. Check out the video below for a great discussion of the issues, or this link or this link.
Double-whammy signifies the demise of the dinosaurs
The meteoric impact that wiped out the non-bird-line dinosaurs is an iconic image of life and death on Earth. It signifies a point in time when life changed forever. It took from us animals that we will never see again.
But was it just a single strike that created these winds of permanent change? The crater from Chicxulub in Mexico is the scapegoat for taking dinosaurs from us, but did it have a partner in crime?
Weighing in at about 180km in diameter, the Chicxulub impact was enormous. Imagine that hitting today – it would be the size of many small countries and islands, and devastate humanity.
New dinosaur competes to be Europe’s largest ever land predator
This was originally posted at: https://theconversation.com/new-dinosaur-competes-to-be-europes-largest-land-predator-23997
Say hello to Torvosaurus gurneyi, the newly discovered theropod dinosaur that lived in Europe around 157-145 million years ago. It is potentially the largest land predator discovered in Europe and one of the largest carnivorous dinosaurs from the late Jurassic period. The identification of this new species plays an important role in developing our understanding of how different dinosaur species were distributed across the globe, as well as the ecology of large European predators at this time.
Similar in appearance to the North American species Torvosaurus tanneri, the remains found in Portugal were initially regarded as near-identical to them. But closer scrutiny and greater knowledge of the anatomy of theropod dinosaurs has led to several key features being identified in the new species.
Erlikosaurus, the little dinosaur experiment
The evolutionary line from theropod dinosaurs is absolute. There is no question that this is one of the greatest stories that life on Earth has ever told us, But evolution is not linear; it’s chaotic. It’s bizarre. Along this theropod line, dinosaurs were experimenting – they were the evolutionary scientists of their time.
One of the weirdest things that theropods did was become herbivores again – this is exceptionally odd when we consider that they’re the cousins of epic carnivores like Tyrannosaurus and Deinonychus.
Therizinosaurs were one of these groups of hipster dinosaurs. Not content with a life dining on raw steak, they actually estranged themselves and became ecological innovators, eventually turning herbivorous.