This big cat's seafood snack is an endangered turtle
18 April 2018
Thousands of sea turtles lay eggs on Tortuguero beach in Costa Rica every year. The annual ritual has become a feeding frenzy for jaguars
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Blow Out
18 April 2018
Space movies regularly dispatch characters through an explosively decompressed airlock. But how likely is such a rapid ejection, taking into account the victim's location in the airlock and its volume? Assuming they are wearing a space suit, what is...
Feel the heat
18 April 2018
We sweat to cool our bodies by evaporation, but when we wipe the sweat away – a natural reaction in humans – are we defeating that function and making ourselves hotter? Do we also hasten dehydration by making our bodies sweat more, to replace what we've...
Round the bend
18 April 2018
Look carefully at this photo of a rainbow over Dinas Head near Fishguard in Wales (right) and you will notice that as it nears land it looks like there is a sharp bend in its arc. What caused this?
Feedback: The unusual health risks of competitive chilli eating
18 April 2018
Nurse, get some milk, stat! Plus: zombie racoons in Ohio, the science of crying on airplanes, why penguins go with the floe, and more
Become a time lord with this remote control clock
18 April 2018
An invention that makes time fly lets you send the kids to bed early and see off lingering guests
