The Perseid meteor shower starts this week and peaks Aug. 12 to 13 under a new moon, its clearest run in years and the same night...
SpaceX aims to launch Starship Flight 13 as soon as July 16, testing fixes to the booster failure that marred Flight 12 and Version 3's debut.
Penn State researchers find that black hole mergers may be governed by a simple entropy rule, predicting the final remnant to within a few percent.
A study says marine cloud brightening could weaken El Niño events and lift La Niña cooling by more than 40%, but political and technical risks are...