Strontium optical lattice clock exhibits record-high coherence time

Optical lattice clocks are emerging timekeeping devices based on tens of thousands of ultracold atoms trapped in an optical ...
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'Gently does it' – locksmiths share the key to easily fixing a frozen lock yourself this winter, and when to leave it well alone

Here, locksmiths reveal how to fix a frozen lock and when to leave it well alone to make your home more safe and secure, and ensure your keys don't break. Frozen locks occur when moisture gets trapped ...