Digital danger: Is our online activity damaging us? Two new books make the case that online living harms our psychological health and security – but there are still great rewards to reap, says Jacob AronCultureLab
LifeSumatran orang-utans delay puberty to build up strength Young male orang-utans can put off sexual maturity for up to 10 years, building up their strength until they're ready to challenge dominant males 51¶¯Âþ