This week in Astronomy and Physics

Diamonds sampled by plumes from the core–mantle boundary

An ancient clock

Deterministic photon-photon √SWAPgate using a Λ system

Evidence for a first-order liquid-liquid transition in high-pressure hydrogen from ab initio simulations

Hydrogen 21-cm Intensity Mapping at redshift 0.8

A Galactic Center Origin for HE 0437-5439, the Hypervelocity Star near the Large Magellanic Cloud

The Jarzynski Identity and the AdS/CFT Duality