A Tiny Magma Blob May Rewrite Earth's History of Plate Tectonics By Tim Childers An International team of scientists finds evidence that Earth began recycling itself more than 3 billion years ago.
If Aliens Are Flashing Laser Beams at Us, We Now Have a Way to Detect Them By Tim Childers Are aliens using super powerful flashlights to get our attention? Astronomers think there's a chance they are.
