EarthThe sparkling ice hummocks of the world’s biggest lakeTemperature and pressure differences in the water of Russia’s Lake Baikal cause cracks to form, and great transparent slabs of ice rise off the surfaceRegulars
EarthHuman arrivals wiped out the Caribbean’s giant ground sloths Many giant mammals in the Americas have died out but it has been hard to say whether humans or natural events were responsible. Now, in the Caribbean at least, we know News