We're all familiar with gravity as "the reason objects fall", but there's much, much more to gravity than that. Gravity is a long range attractive force between all...
From a distance, our galaxy would look something like this. A flat spiral, some 100,000 light years across, with pockets of gas, clouds of dust, and about 400 billion stars rotating around the...
Time is flying by on this busy, crowded planet as life changes and evolves from second to second. At the same time, the arc of the human lifespan is getting longer: 67 years is the global average, up...