How much should we worry about asteroids?
Astronomers have found an estimated 40% of the near-Earth asteroids that are 140 m and larger. You do the math.
A dry run to save the planet: NASA DART probe closing in on asteroid impact
Reading Time: 6 minutes NASA’s DART spacecraft will crash into an asteroid on September 26, the first real-life test of planetary defense techniques.
Entropy, time, and the arrow of adolescence
Is there an inherent link between entropy and the momentum of time?