Galaxy pair look like foes but have never met
These galaxies look like they're in the middle of a full-on cosmic collision, but they're actually separated by tens of millions of light years of space
Zoologger: Angry lizard starts fights for no reason
Most animals don't start fights with other species as there's simply no point - but nobody told the slap-happy Dalmatian wall lizard
Genetically modified crops encourage beneficial bugs
Farmers who would love to control aphids without spraying pesticides may be helped if their neighbour is growing certain genetically modified crops
All eyes on China's green leap forward
The west can learn from China's foray into environmental economics
You may carry cells from siblings, aunts and uncles
Male cells found in the umbilical cord blood of baby girls with older brothers suggests fetal cells cross between mother and baby more than once thought
Small, cheap black-hole hunter could be new NASA model
Now in orbit around Earth, the NuSTAR space telescope will produce images 10 times as crisp as those of any previous telescope
Video game graphics outpace console hardware
Games developers have learned new tricks for exploiting years-old hardware, leading to stunning graphics
Hormone hangovers spell financial doom
Financial crises are down to male traders' hormonal mood swings, evolution and culture combine, and life's better if digital things work together
Black holes could act as cosmic Rosetta stones
A mathematical makeover means these strange objects could be used to translate between gravity and quantum mechanics
China leads the march for the green economy
Quantifying the financial value of services provided by ecosystems will be a hot topic at the Rio+20 conference - and China is taking the lead
US fails on Happy Planet Index
The world looks very different when countries are measured according to quality of life and environmental sustainability
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