20,000 megawatts under the sea: Oceanic steam engines
Jules Verne imagined this limitless power source in Victorian times – now 21st-century engineers say heat trapped in the oceans could provide electricity for the world
Can these pop-sci self-help books make you smarter?
Mind-reading, prediction and intelligence – these three books promise three superpowers. But do they make Kate Douglas a better person?
Prime number enigma could be solved by simple networks
Is there a pattern behind prime numbers? Networks that reproduce the mathematical relationships between primes and non-primes could tell us
'My hospital helps women raped in east Congo's wars'
Surgeon Jo Lusi helps heal women raped in the wars of eastern DR Congo – but he's also fighting to change the culture that drives sexual violence
Double flood trouble for Europe in the next 40 years
The cost of flood damage in Europe could increase fivefold, with climate change partly to blame
Ear bath helps explain rare urge to cut off own limb
Indirect brain stimulation by pouring water into the ear does not cure people who feel rejection towards a limb, but hints at the cause of the problem
Girls may be more resilient to autism-linked mutations
Among autistic kids, the finding that girls have more of a type of genetic mutation than boys backs up the idea that females are somehow shielded
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