Latest Countdowns
22 jobs artificial general intelligence (AGI) may replace — and 10 jobs it could create
Artificial Intelligence (AI) is set to improve the world for many — but others may lose out.
32 scary parasitic diseases
Parasites can cause a wide range of diseases in humans, ranging from short-term to lifelong.
32 strange places scientists are looking for aliens
From planets and moons in our solar system to dying stars and parallel universes, here are some of the far-out places scientists are searching for alien life.
32 of the most colorful birds on Earth
Birds are some of the most colorful animals on Earth, with a palette of rainbow tones to feast your eyes on. Here are our picks for some of our most flamboyant feathered friends.
32 weird technologies that never took off
We've seen many big hitters capture our imagination, alongside a handful of oddities and misfits that were less successful.
15 extinct giants that once roamed North America
Countdown Until the end of the last ice age, American cheetahs, enormous armadillolike creatures and giant sloths called North America home. But it's long puzzled scientists why these animals went extinct about 10,000 years ago.
32 times lasers revealed hidden forts and settlements from centuries ago
Lasers have helped uncover ancient human-made structures the world over.
Top total solar eclipses to look out for over the next decade
Want to experience totality again? Here are the next seven total solar eclipses across the world, from Alaska to Australia.
