Earth Vulnerable to Sun Blasts, 'Double Impact'
Earth dodged a possible major catastrophe in 2012 when powerful sun blasts narrowly missed the planet.
The bursts could have caused serious damage to power grids as it did more than 100 years ago. A massive solar storm took out the telegraph system in the United States in 1859.
A recent study found that if a similar storm hit now it could cost the world economy $2.6 trillion, Reuters reported.
Meanwhile, a solar flare isn't Earth's only concern.
The BBC reported researchers have found evidence that in the past, two asteroids hit our planet at practically the same time.
Some locations of other double impacts have already been mapped on Earth, but scientists estimate only about 3 percent of the impact craters come from double asteroids.