I have a new post on my Guardian blog:

“Friday's Russian meteorite strike gives studies of ways to knock dangerous asteroids off course an added urgency

Science fiction author Larry Niven once joked: "The dinosaurs became extinct because they didn't have a space programme." He meant that if we see an asteroid heading our way, we can launch a rocket to intercept it. But just how do we deflect an asteroid? ...”

Read the post here.