STEM Challenges

Exoplanets are impossibly faint and close to blinding stars hundreds of light-years away. Yet astronomers have developed five brilliantly clever metho...

For most of human history, we could only wonder whether other stars had planets. In the last three decades, telescopes have revealed thousands of worl...

How will the universe end? Scientists have mapped out several possible futures depending on the nature of dark energy. From the Big Freeze to the Big ...

Dark energy is the dominant component of the universe — yet we have almost no idea what it is. Explore the leading explanations, from Einstein's cosmo...

In 1998 two rival teams of astronomers set out to measure how fast the universe's expansion was slowing down. What they found instead shook cosmology ...

Scientists around the world are using extraordinary experiments — from detectors buried miles underground to the world's most powerful particle accele...