Business Standard25 天
World's most accurate clock is now on the market: Here's how much it costs
Kyoto-based precision equipment manufacturer Shimadzu Corporation has begun selling the world's most accurate commercially available timepiece -- a strontium optical lattice clock with a deviation of ...
National Geographic news28 天
Where were enslaved Africans taken from? The answer could be hidden in their bones.
Scientists have created a groundbreaking map of strontium isotopes found across sub-Saharan Africa—which could help descendants of enslaved people reconstruct their family histories. Strontium ...