A set of extraordinary underwater tracks were found at Cameros Basin in northern Spain. According to the latest from the Geological Society of America, this discovery provides the most compelling evidence to date that some dinosaurs were swimmers, according to

The tracks at Cretaceous Lake, from 125 million years ago, consist of six asymmetrical pairs of two to three scratch marks each. Each set of scratch marks, preserved in a layer of sandstone, averages approximately fifty centimeters in length and fifteen centimeters wide. Scientists produced and painted a picture of a large floating animal clawing the sediment as it swam in approximately 3.2 meters of water. Ripple marks on the surface of the site indicate that the dinosaur was swimming against a current, struggling to maintain a straight path.

For some time, the question of whether dinosaurs could swim was controversial, for most have believed that dinosaurs were fit for living on land. These tracks are the first evidence that dinosaurs could swim for a long period of time in water.