Food or family? Florida reptiles battle over eggs
This invasive Argentine black and white tegu is a beauty, but it's been caught in the act of pilfering the eggs of a native American alligator
Vermont is first US state to create long-term climate plan
Size-wise, Vermont is a minnow, but it is also a pioneer with the only long-term plan of any US state to prepare for climate change
Space dreams: 5 futuristic ideas that won NASA cash
Drones that would land on Saturn's giant moon, Titan, using a hot-air balloon are among the far-out ideas due to receive funds from NASA
Your favourite city smellscapes in pictures
Smells, scents and stinks are a big part of city life – yet we tend to think of urban smells as a bad thing. We asked you to sniff out some you like
Extreme checklist to look for odd life on other worlds
Snow algae and light-shunning seaweed are some of the weird life forms that may rule on habitable exoplanets, according to criteria from a NASA astrobiologist
Gene editing tool can write HIV out of the picture
The latest form of genetic engineering can give human cells a rare mutation that keeps them HIV-free
Island-hopping odyssey brought civilisation to Europe
The first farmers entered Europe from the Middle East by sailing between the idyllic islands of the Aegean Sea 9000 years ago
Why cities shouldn't lose their distinctive stinks
Our attempts to deodorise urban streets have gone too far, says Victoria Henshaw. There are powerful reasons to reacquaint our noses with city scents
Information famine at the centre of the infosphere
Two new books explore how the internet is changing us and our world – but it's too soon to tell which of the changes really matter
Making science cool won't win over the denialists
US pop culture now celebrates science – but that doesn't stop science deniers dismissing inconvenient truths. Showbiz can help, says journalist Chris Mooney
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