The first use of a novel method of analyzing Mars’ gravitational force supports the idea that the planet once had an extensive northern ocean. In doing so, the method defines the scope of what scientists refer to as the northern Martian paleo-ocean in more detail. The work was published in July in the journal Icarus, which is affiliated with […]
Gravity: we barely ever think about it, at least until we slip on ice or stumble on the stairs. To many ancient thinkers, gravity wasn’t even a force–it was just the natural tendency of objects to sink toward the center of Earth, while planets were subject to other, unrelated laws. Of course, we now know […]
For the first time, scientists have observed ripples in the fabric of spacetime called gravitational waves, arriving at Earth from a cataclysmic event in the distant universe. This confirms a major prediction of Albert Einstein’s 1915 general theory of relativity and opens an unprecedented new window to the cosmos. Gravitational waves carry information about their […]