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...
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...
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?
