Just north of the Martian equator lies a 45 km (28 mi) wide impact crater that scientists believe may have been the site of an ancient lake. Here at Jezero Crater...
You walked to your neighbor’s door with the best intentions. They left their car lights on, but before you could tell them, a pack of furious beasts run after you...
Nearly 800 million light years away, astronomers detected something that should not fit neatly into the known categories of the universe. The mysterious object had a...
Today on What If, we’re taking Jupiter’s deadly gases and unleashing them on Earth. Where could you be safe from these toxic winds? How would you breathe...
What If the Gulf Stream Stopped? Europe Could Freeze as the Rest of the World Heats Up
Our planet has seen this before. Its ice has already melted. Water levels have risen. Ocean currents have already stopped. The last time this happened was 13,000 years...
Death and the possibility of an afterlife have fascinated artists, philosophers, and scientists throughout history. Fear, hope, dread… these are all things we...
You were looking forward to a relaxing cruise across the Atlantic, but suddenly something feels very wrong. The ship begins rocking violently, your navigation equipment...
The year is 2040. You hunker down with your fellow human survivors, listening for the sound of your enemy. The cyber-bugs have taken over. How did this happen? What...
A gas cloud located 500 light years away from our solar system is about to become a planet. This process usually takes a few hundred million years, but what if we made...
Nuclear weapons are the most powerful and frightening tools ever created by humanity. With over twelve thousand warheads spread across the globe, these devices hold...
Antimatter is the most potent fuel source known to humanity. And it could be the secret to faster-than-light space travel. But where in the Universe would we find...
Artificial intelligence is no longer just a concept from science fiction. Today’s AI systems are rapidly advancing, with some already matching the intelligence of famous...
Divers Found Perfect Circles on the Seafloor in 1995, It Took 18 Years to Catch the Artist
Somewhere off the coast of Japan in 1995, divers found something on the seafloor that should not have been there. A perfect circle, roughly two meters across, carved...
Every year, around 140 million babies are born worldwide. And if we continue at this pace, 50 years from now the global population will reach 10.5 billion people. The...
Today, we’re mapping out a realistic simulation of a zombie apocalypse. Let’s see if you’ve got what it takes to survive the end of civilization...
Reptiles have ruled the planet for hundreds of millions of years, and some of them still inspire the same fear they did in prehistoric times. From giant constrictor...
Imagine a normal night at home suddenly interrupted by a blazing space rock crashing straight through your roof. Glass shatters, furniture is destroyed, and in seconds...
A team of Russian scientists is working hard to resurrect this quintessential Ice Age behemoth. But what if they never disappeared in the first place, and still roamed...
Wouldn’t it be great to have a truly jaw-dropping view? Like windows looking directly into space? Well, it’s time to build your very own cosmic skyscraper. What would it...
Caledonian crows like 007 show problem-solving skills well beyond what survival might demand. They fashion tools out of twigs and sticks to reach food. And they can be...

