The news that South Korean scientists are planning to clone a mammoth, using the DNA of a particularly well-preserved specimen in the Siberian permafrost, has reignited the debate over the ethics of cloning. But whether or not it’s right, could it happen? And what other animals could, or couldn’t, we clone? Mammoth It may be possible to clone a mammoth. It would be an enormous technical challenge,... 

Scientists in Argentina say they have found the remains of what could be the largest dinosaur ever to have walked the planet. By analyzing the fossils, they say it could have been 40 meters in length and weighed 77 tons – as much as 14 elephants. The discovery was made by a local farm worker in Patagonia. The fossils were then excavated by a team of paleontologists from the Museum of Paleontology...