Irremplaçable. Une fois disparu, c'est pour toujours... Ne l'oublions pas.
Like us, birds stand on two legs. But unlike us they 'crouch'. To explain this odd posture, scientists at the Royal Veterinary College in the UK looked at the ancestors of birds: dinosaurs. They made 3D models of various dinosaur taxa including Tyrannosaurus and the bird-like Velociraptor and Archaeopteryx. In this video, see how the models were made and what they show us about the evolution of bird locomotion and flight.
Read the research paper: Linking the evolution of body shape and locomotor biomechanics in bird-line archosaurs
Nature, 24 April 2013
Scientists often study penguins to see how climate change is affecting the marine ecosystem. To keep track of individual birds they use flipper bands. But a new study shows that these bands reduce the penguins' breeding success and survival, thus biasing the data. For more, listen to the researchers talk about the study on the Nature Podcast and read the original research paper.
Nature, 11 January 2011
Just off the coast of Florida, 17 metres below the surface, lies Aquarius - the world's only operating undersea laboratory. Scientists can live in Aquarius for up to two weeks, giving them plenty of time to study the coral reef community. But with budget struggles ahead, the US Congress may withdraw funding for the lab. Mark Schrope dived down to meet the researchers who are trying to save this iconic underwater base.
Read the Nature News story: End of an age for Aquarius
Nature (International weekly journal of Science), 01 August 2011