16-06-04 It is a classic playground scare story - if you swallow chewing gum it will stay in your digestive system for seven years. 有个经典的大人拿来吓唬小孩的谎言如果你吞下了口香糖，它将在你的消化系统里停留七年。 But according to scientists at the American...

15-08-05 Scientists have discovered how earthworms can digest plant material, such as fallen leaves, that would defeat most other herbivores. Earthworms are responsible for returning the carbon locked inside dead plant material back into the ground. They dra...