Snip:

A team of scientists from the China Rocket Research Institute in Beijing is working on a method for destroying large asteroids that threaten Earth using a nuclear bomb, it said. The idea is as follows: first, a metal impact probe crashes into the asteroid and bores a deep hole, then a second spacecraft drops a nuclear bomb into this hole, which detonates inside the asteroid, the publication said.

According to the scientists cited by the newspaper, a three-megaton explosion, roughly equivalent to 200 Hiroshima bombs, could completely destroy an asteroid approximately 100 meters in diameter. The researchers also found that placing a bomb 30 meters below the surface can more than triple the change in an asteroid’s velocity compared to a shallow detonation, making this method “significantly more effective at altering an object’s trajectory.”