The Big Bang theory has dominated our understanding of the universe’s origin for almost 100 years. It describes a moment when all of space, time, and energy were born from a single infinitely dense ...

For centuries, humanity has pondered the ultimate fate of the universe. From theories of infinite expansion to the concept of a cosmic “big crunch,” scientists have long sought to understand how the ...

How confusing inevitability with reality built decades of paradox. What if general relativity never actually tells us that ...

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 ...