More from Iona Twaddell
Explore the latest news, articles and features
Life
Armoured wasps chop off opponents’ heads in brutal fig wars
News
Health
Stone-age people were making porridge 32,000 years ago
News
Space
Philae may have moved – and Rosetta will start to look south
News
Life
Beautiful sea sapphire can make itself invisible in an instant
Regulars
Earth
Chance of polar bears surviving food shortage recedes with ice
News
Life
Discovered: the unique feature that makes human screams so awful
News
Environment
See the secret spots hidden in the fur of black panthers
Regulars
Health
Women dependent on cocaine or meth have less grey matter
News
Earth
‘Invisible’ barn melts into the forest to reflect its setting
Regulars
Physics
What the sun would look like if you had X-ray vision
Regulars