SPACE
What Happens If the Sun Explodes?
Follow what Earth would experience, how quickly we would know and what the consequences would be.
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BIG WHAT-IFS
What Happens If...
The World Changes
In a Big Way?
Explore enormous questions about Earth, space and humanity — from sudden cosmic events to changes that could reshape the planet over time.
Space
The Sun, asteroids and enormous events beyond Earth that could transform life on our planet.
Planet Earth
What could happen if the systems that shape our planet suddenly changed or stopped.
Life & humanity
Big questions about people, nature, extinction and how the world could change without us.
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Big What-If questions
These questions begin with an unlikely or enormous change, then follow the chain of events to see what could happen next.
EARTH
What Happens If the Earth Stops Spinning?
Explore the immediate physical effects and the longer-term changes that could follow.
Find out what happens →HUMANITY
What Happens If Humans Go Extinct?
See how cities, infrastructure and ecosystems could change over days, years and centuries.
Find out what happens →CLIMATE
What Happens If All the Ice Melts?
Explore the difference between land and sea ice and what widespread melting could mean for coastlines.
Find out what happens →NATURE
What Happens If Bees Go Extinct?
Explore how losing bees could affect pollination, ecosystems, agriculture and the food we grow.
Find out what happens →SPACE
What Happens If an Asteroid Hits Earth?
See how the consequences change with asteroid size, speed and where on Earth it strikes.
Find out what happens →