A massive mile-long double asteroid linked to a one-inch meteor that streaked a fireball over Japan three years ago could threaten humanity in millions of years if it eventually breaks up, scientists wrote in a report published Monday.

“The potential breakup of the rock could be dangerous to life on Earth,” Toshihiro Kasuga, a visiting scientist at the National Astronomical Observatory of Japan and Kyoto Sangyo University, said in a release Wednesday, according to CNET. “Those resulting asteroids could hit the Earth in the next 10 million years or so.”

The findings were first reported in The Astronomical Journal Monday.

NASA researchers are investigating the potential of mycelia — the mass of nutrient-absorbing, widely branching underground threads that make up much of a fungus’s bulk — to help construct outposts on the moon and Mars.

The golf cart sized rover called VIPER will search for and sample water ice on the lunar south pole. LEARN MORE go.nasa.gov/2Nq3Lyq

Two NASA astronauts are taking a spacewalk outside the International Space Station today (Jan. 15), and you can watch all the action live online.

For the first spacewalk of the year, NASA astronauts Christina Koch and Jessica Meir will spend about 6.5 hours working in the vacuum of space to continue replacing old nickel-hydrogen batteries on the station’s solar arrays with new lithium-ion batteries. The spacewalking duo began working to replace these batteries during a spacewalk together on Oct. 18, and that was the first all-woman spacewalk in history.