Today on New Scientist: 20 August 2012

US emissions lowest since 1992

Many US power companies have dropped coal in favour of lower-carbon natural gas, but the coal is being burned elsewhere in the world

Uncanny human double exposed as robot when it blinks

Watch an exclusive video of a robot professor and his human counterpart from a new documentary

Bigfoot (spider) found hiding in Oregon cave

The legendary beast known as bigfoot may still elude us, but its spider counterpart has turned up in a US cave

Aphids may be first photosynthesising animal

Aphids produce more ATP - the biological energy molecule - in response to light. While this doesn't prove they photosynthesise, it hints that they might

Crane lower that rover! NASA spoof goes viral

A music video celebrating the arrival of Curiosity on Mars instantly went viral. David Hudson, a creator and star of the video, explains how it happened

Marine lessons in becoming a killer

Local populations of killer whales have developed their own cultural traditions - see some of them in this gallery

We're still on the slippery slope to peak oil

Technology and exploitation of unconventional sources can't defer the long-predicted decline in global oil production, says David Strahan

Frankenstein virus creates malware by pilfering code

By hunting through benign bits of code on your computer, the Frankenstein virus can turn itself into something rather nasty

They never forget: The strange gift of perfect memory

Some people can recall what happened on almost every day of their lives. Unlocking their secrets could shed light on the way all our memories work

Imaging cameras detect severity of skin problems

Photographing skin in infrared and UV light can highlight psoriasis, potentially enabling doctors to diagnose such skin diseases more accurately

Space-time ripples record black hole crashes

Gravitational waves contain details of merging black holes, and could tell us whether the earliest black holes were heavy enough to form the first galaxies

Folded DNA becomes Trojan horse to attack cancer

Hiding a powerful cancer drug inside a complex DNA structure can help it kill cancer cells that are resistant to the drug

'Cold' solar loops may help solve corona puzzle

A new type of magnetic loop found on the sun might help identify possible explanations for why the corona is hotter than the sun's surface

Smartphone that feels your strain

Your smartphone could soon help you identify when you're feeling stressed, thanks to software that can recognise anxiety from your voice patterns

Bendable teeth seen for the first time

Suckermouth catfish are the first animal known to have flexible teeth - and it seems they are not the only ones

Curiosity ready to roll, right after target practice

With its first science targets identified, the rover is set to take a drive across Mars. But first it needs to prove it's a crack shot with a laser

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