The twin punch of a meteor raining destruction on remote Russia and an asteroid hurtling past Earth prompted calls from scientists and political leaders for greater vigilance to combat risks from the heavens.
The asteroid that will hurtle past Earth this week at eight times the speed of a bullet is being viewed by a group of former astronauts as more than a celestial curiosity. It’s a warning shot from the heavens.
Carl Sagan once said that to make an apple pie from scratch you must first invent the universe. He was right. And in inventing the universe you will need to build all the objects and structures found in it.