Special report by PEOPLE’S WORLD
CHECK the internet for Britain’s heaviest mammal and the answer will be the red deer. A fully grown healthy stag might weigh in at a quarter of a ton (250kg). Compare that with an African elephant that can weigh up to six tons.
Now marvel at the young – far from fully grown – sperm whale that washed up last week on a beach in north Norfolk. Best estimates reckon that it weighed in at 10 times as much as a bull elephant.
At nearly 60 tons that makes this British wild species one of the heaviest animals in the world. Only the blue whale – reaching up to 200 tons – and a couple of other whale species are heavier.
New research into mutations in sperm helps us better understand why they occur, while debunking a few myths in the process, write ROX MIDDLETON, LIAM SHAW and MIRIAM GAUNTLETT
One of the major criticisms of China’s breakneck development in recent decades has been the impact on nature — returning after 15 years away, BEN CHACKO assessed whether the government’s recent turn to environmentalism has yielded results
When a couple moves in downstairs, gentrification begins with waffles and coffee, and proceeds via horticultural sabotage to legal action


