World Truth

There’s already a strange story behind comet 41P/Tuttle-Giacobini-Kresák, or just 41P: It took almost 100 years to identify and occasionally flares. And now, its spin is rapidly slowing down. Scienti…

There’s no such thing as a “close call” in SETI – either the radio telescope has picked up an alien signal, or it hasn’t. “Close” doesn’t exist in this one-bit experiment, any more than it doe…

An astronomer thinks he's pinpointed the source of a mysterious radio signal from space: a passing comet that nobody knew about. But his colleagues said they're still skeptical of the e…

An experiment mimicking our early solar system reveals that the sugar ribose, the 'R' in 'RNA,' can arise in the icy grains of comets. The origin of life on Earth has been a ma…