Harvard University

How Earth was watered

Early Earth's accidental deluge via water-carrying comets has long been a stumbling block for those interested in life on other planets.

Feb 28, 2014
4.2 / 5 (27) 6

Mars rover, slightly used, runs fine

(Phys.org) —When a car gets regular oil changes and care from a good mechanic, keeping it running for 10 years or more isn't exactly an impressive feat of engineering. But then again, such a car isn't an ...

Feb 05, 2014
5 / 5 (6) 0