Asteroid Bennu seems to have come from a long-lost world on the fringes of the solar system, where saltwater pooled and dried ...

White House Press Secretary Karoline Leavitt told reporters that President Trump would be implementing tariffs on Canada, Mexico and China starting on Saturday. NBC News' Garrett Haake reports from ...

Early analysis of asteroid samples from NASA’s OSIRIS-REx mission show the residue of an icy brine, and a soup of amino acids.