More from Ewen Callaway
Explore the latest news, articles and features
Humans
Giant sperm stretch back millions of years
News
Life
Animals that count: How numeracy evolved
Features
Humans
Monkey ‘IQ test’ hints at intelligent human ancestor
News
Earth
Panda love calls could help conservation efforts
News
Health
Video game makes HIV awareness fun
News
Life
Get a grip: Truth about fingerprints revealed
News
Humans
Looking like daddy has material rewards
News
Humans
Speeding up brain networks might boost IQ
News
Humans
Why your brain just can’t remember that word
News
Humans
Ancient warfare: Fighting for the greater good
News
Mice get human language gene
News
Health
Foreign accent syndrome doesn’t mean brain damage
News