Physics Why we need to invoke philosophy to judge bizarre concepts in science Theories of mind and cosmos are inevitably preposterous - knowing how to weigh competing implausibilities can help us decide which we should back News
Environment There are growing fears of an alarming shift in Antarctic sea ice Antarctic sea ice cover remains far below average levels for the third year in a row, but researchers are uncertain whether this is a permanent shift driven by climate change or part of natural fluctuations News
Environment Should everyone start eating snakes to save the planet? Pythons convert food into meat more efficiently than other livestock, and they can be fed on waste meat, but this doesn't mean snake meat is inherently more sustainable News
Space Astonishing photograph of last year's annular solar eclipse in Utah Pieced together digitally from thousands of images, this shot of last October's annular eclipse, from Andrew McCarthy and Daniel Stein, is a curtain-raiser for next month's total solar eclipse in North America Regulars
Earth Why supersonic, diamond-spewing volcanoes might be coming back to life Strange volcanoes called kimberlites bring diamonds up from Earth's depths. Scientists have always struggled to understand why they switched off millions of years ago – but perhaps they didn't Features
Comment Sunken Lands review: Heeding the flood warnings of history From a fabled drowned kingdom in Wales to echoes of Noah's ark in the Mahabharata, warnings of hubris in abusing nature resonate in Gareth E. Rees's world tour of flood myths Culture
Mathematics Try these mathematical magic tricks that are guaranteed to work There are no rabbits pulled out of hats here – these tricks rely on mathematical principles and will never fail you, says Peter Rowlett Regulars
Humans People watch sports, have sex, make children, study finds Feedback is intrigued by new research into how major sports tournaments "were associated with increases in the number of babies born" nine months later - but only for supporters of the winning teams Regulars