President Donald Trump just gave the longest State of the Union address in recorded history, a speech filled with examples of the United States’ leadership status in the world, but

There’s a pretty good chance you’ve heard of a drone feature called Obstacle Avoidance. And, as the name suggests, it aims to sense and avoid obstacles to stop drones from

Two ageing stars in the binary system AFGL 4106 sculpt a glowing, egg-shaped nebula as they approach the end of their lives. (Image credit: ESO/G. Tomassini et al.) Astronomers have