Asteroid alert - Halloween asteroid hurtles towards earth
Earth Planet with Rising Sun and Asteroid Belt (Elements of this image furnished by NASA) Shutterstock

Lola Gayle, STEAM Register There are now a total of 15,000 known near-Earth asteroids (NEAs), and we're adding an average of 30 new discoveries every single week. That's a 50 percent increase in the number of known NEAs since 2013, when discoveries reached 10,000 in August of that year. "The rate of discovery has been high…