Researchers have unveiled a new model for the universe’s birth that replaces cosmic inflation with gravitational waves as the ...

Scientists have recreated the first molecule ever to form and found that it likely played a much bigger role in the birth of early stars than previously thought. It then took another 380,000 years for ...

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 ...