Animals first evolved to live exclusively on land about 370 million years ago – but on dozens of occasions since then land animals have gone back to exploiting the seas. That might be because the shallow seas around continents are so full of food that they proved an irresistible lure. Image: www.metaphoricalplatypus.com
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The ocean current that gives western and northern Europe a relatively mild climate might be at greater risk of shutdown than we thought. Image: NASA Goddard Photo and Video
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Early birds like Archaeopteryx were far too heavy to sit on their eggs without cracking them. The conclusion holds true for non-bird dinosaurs too, leading to fresh doubts about how to interpret spectacular fossils that appear to show dinosaurs brooding their eggs. Image: bgv23
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Some of the best evidence for early life is provided by structures called stromatolites. Many geologists assume these stromatolites were made by microbes living in shallow, sun-drenched water. A new discovery questions that conclusion. Image: MARUM –Center for Marine Environmental Sciences, University of Bremen
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Another year, another climate record broken. But don’t let this one wash over you. Arctic sea ice is usually at its most extensive in early March, which marks the end of the Arctic winter – but this year’s winter ice cap is the smallest recorded in almost 40 years of monitoring. Image: NASA Goddard Photo and Video
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