A bus-sized asteroid hurtled past Earth this weekend, coming closer to the planet than the moon.

Asteroid 2014 HL129 came within 186,000 miles of Earth, even closer than the moon, which is on average 238,855 miles from Earth. Scientists only saw the 25-foot asteroid days before it whizzed by.

Bruce Betts, of the Planetary Society, said that the asteroid was on the smaller side and little of it would have made it to the ground.

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However, Betts told Neil Cavuto that scientists need to be looking more, particularly for smaller asteroids. He said we must improve search techniques as well.

“It’s a preventable natural disaster, it’s the only one,” he said. “We need to do more.”

Watch his full interview above.

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