The Boston Marathon is viewed by many as a lifetime athletic goal. But recent changes in the U.S. have made some runners question if they should travel for it.

SpaceX Starship and its Super Heavy booster launching. Watch view of the liftoff in slow motion from a launch tower camera. Footage courtesy SpaceX | mash mix by Space.com's Steve Spaleta ...

Humanoid robots ran a half marathon in Beijing on Saturday, demonstrating China's ambitions with the technology, but only four out of 21 bots finished the course.