Add Yahoo as a preferred source to see more of our stories on Google. In a few billion years, the Milky Way and Andromeda, the nearest spiral galaxy, might collide. Future observers could be treated ...

The universe is approaching the midpoint of its 33-billion-year lifespan, a Cornell physicist calculates with new data from dark-energy observatories. After expanding to its peak size about 11 billion ...

Whether the universe will "end" at all is not certain, but all evidence suggests it will continue being humanity's cosmic home for a very, very long time. Our understanding of the future of the ...