


The world’s first nuclear clock is on the horizon
It would be 1000 times more accurate than today’s atomic timekeepers
FOR THE discerning timekeeper, only an atomic clock will do. Whereas the best quartz timepieces will lose a millisecond every six weeks, an atomic clock might not lose a thousandth of one in a decade. Such devices underpin everything from GPS and the internet to stock-market trading. That may seem good enough for most. But in a paper recently published in Nature, researchers report being ready to build its successor: the nuclear clock. Ekkehard Peik, one of the field’s pioneers, says such a clock could be a factor of 1,000 times better than today’s standard atomic clocks.

Baby formulas now share some ingredients with breast milk
They may one day replicate its benefits

Breast milk’s benefits are not limited to babies
Some of its myriad components are being tested as treatments for cancer and other diseases

How to protect satellites against “killer electrons”
All it takes is very long radio waves
A common food dye can make skin transparent
The discovery allows scientists to see inside live animals
Fewer babies are born in the months following hot days
The effect is small but consistent
New tech can make air-conditioning less harmful to the planet
The key is energy efficiency