SPACE
Saturn moon’s lake: it’sgreat for rock-skimming The largest lake on Titan is mirror-smooth, varying in height by less than 3 millimetres, new radar observations show. Seasonal changes may explain why it is so flat
PHYSICS
Disrupt emergency exits to boost evacuation rates When a packed room has a narrow exit door, people will get out faster if an obstacle is placed in front of the door, physicists have shown
TECH
Magic ink offers full-colour printing in an instant An ink that produces colour in the same way birds and insects do could be used as the basis of…
