How did sauropods lay eggs? What did dinosaurs evolve from? How did dinosaurs eat their food? Where did dinosaurs live? Did dinosaurs lay eggs? How are birds related to dinosaurs? What are some characteristics of dinosaurs? How did theropod dinosaurs sleep?
Biology textbooks describe the small changes in the beaks of the Galápagos finches as exemplars of how birds evolve in response to environmental changes.However,recent studies of the abundant fossil birds at Rancho La Brea find no evidence of evolutionary responses to the dramatic climate changes ...
Did birds evolve from pterosaurs? The Pterosaurs and pterodactyls wereonce considered ancestors of birds, and there are certain similarities such as pneumatic bones, but the pterosaurs had a wing membrane like bats and no feathers. Birds evolved from a group of small bipedal dinosaurs. Why did...
Only with the appearance of true humans – the genusHomo– did hominins begin to look and behave a little more like we do. Few now doubt that our genus evolved from a species of australopith, although exactly which one is a matter of debate. It was probably Lucy’s speciesAustralopithecus...
The evolution of flight in dinosaurs is one of the most fascinating and complex transitions in the history of life on Earth. This process involved significant anatomical and behavioral changes over millions of years, leading to the rise of the first birds from theropod dinosaur ancestors. ...
But over the last three decades dinosaur fossils have been discovered with many different types of feathers, leading scientists to believe they are instead the ancestors of birds. Many of these feathered dinosaurs could not fly, prompting a new mystery: If not to take flight, why did they evo...
Walking independently evolved several times in fish, making it an example of evolutionary convergence (similar traits that evolve independently,like wings in bats and birds). The evolution of walking in fish is rare though. There are more than 30,000 species of fish as we know them today (not...
But that system is a one-way street — our bodies didn't evolve to keep blood from pooling in the brain. When this happens, all sort of things could go wrong, including ruptured blood vessels, which can lead to brain hemorrhage. Impact on Heart Medical professionals think heart failure is...
The asteroid impact 66 million years ago not only ended the era of dinosaurs but also caused a 45% extinction of plants in present-day Colombia, facilitating the rise of flowering plants in today’s tropical rainforests. About 66 million years ago, a huge asteroid crashed into what ...
When and where did the ancestors of modern birds evolve? What enabled them to survive the meteoric impact that wiped out the dinosaurs? How did these early birds spread across the globe and give rise to the 10,500-plus species we recognise today – from the largest ratites to the smallest...