Nature

Time lords add leap second to the world’s clocks as Earth slows down

It might feel like there is never enough time, but Earth has gained 27 seconds since the 1970s – an astronomical quirk which is causing a headache for timekeepers. On New Year’s Eve, experts at the National Physical Laboratory (NPL) in Teddington, London, will add a leap second to UK time to account for the fact that the Earth is now spinning more slowly. Immediately before midnight, dials will read

Mysterious chimpanzee behavior may be evidence of ‘sacred’ rituals

I trampled clumsily through the dense undergrowth, attempting in vain to go a full five minutes without getting snarled in the thorns that threatened my every move. It was my first field mission in the savannahs of the Republic of Guinea. The aim was to record and understand a group of wild chimpanzees who had never been studied before. These chimps are not lucky enough to enjoy the comforts of