EarthZoologger: Lemmings swap suicide for infanticide The cute and cuddly Arctic mammals do not hurl themselves off cliffs en masse, but they may practise some judicious infanticide 51¶¯Âþ
EarthFour ways to feed the world By 2025 there will be 9 billion people on Earth, all needing food. We look at the best ways to stave off starvation 51¶¯Âþ