成人快手

Bee Declines
Over a third of all the honeybees in the United States have died in the past two years. Beekeepers in the UK are noticing declines in the number of bees surviving the winter. Three out of the 25 species of bumblebees native to the UK are now extinct with others facing losses. What鈥檚 happening to our bees? Quentin Cooper talks to Alison Benjamin amateur beekeeper and co-author of 鈥淎 World Without Bees鈥� and Dr Nigel Raine, bee ecologist from Queen Mary University in London to find out.

Tungunska Fireball
On the 30th June 1908, a huge fireball hurtled towards the Tunguska River region of Siberia. The explosion that followed was as powerful as 1000 Hiroshima bombs and knocked down an estimated 80 million trees. But 100 years later scientists are yet to find an impact crater or tell-tale meteorite remains. So what happened? Quentin is joined by Dr Phil Bland and Gareth Collins from Imperial College London to find out.