Global temperatures are nearly 2 degrees warmer on average than they were 140 years ago, according to two U.S. science agencies.

NASA is eager for more extra-long missions to study the human body’s adaptation as it looks ahead to Mars expeditions.

Once down, the six-wheeled Perseverance rover should be the best driver Mars has ever seen.

It’s not just Democrats and independents who cringe when Trump says something absurd.