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What If

What if you never aged? What if dinosaurs were alive today? Explore the hypothetical with these and more 'what if' scenarios.


Thought Experiment: What If We Stopped Walking Upright?

In this thought experiment, we imagine what 24 hours in a quadrupedal world for humans would look and feel like. Read more at HowStuffWorks Now. See more »

What if you really ate 50 eggs like in 'Cool Hand Luke'?

Eating 50 eggs isn't impossible. Learn what would really happen if you ate 50 eggs in an hour like in 'Cool Hand Luke' at HowStuffWorks. See more »

What if Earth's core cooled down?

Earth is known for producing life, but it also has a super hot core. Learn what would happen if Earth's core cooled down at HowStuffWorks. See more »

What if we ran out of helium?

Balloons wouldn't be the only things in jeopardy if we ran into a helium shortage. Learn what would happen if we ran out of helium at HowStuffWorks. See more »

What if we drilled into a supervolcano?

Eruptions are no joke, but we all want to know more about volcanoes. Learn what would happen if we drilled into a supervolcano at HowStuffWorks. See more »

What if the Yellowstone supervolcano erupted?

Yellowstone is one of America's treasures, but it has a dark secret. Learn what would happen if the Yellowstone supervolcano erupted at HowStuffWorks. See more »

What if the sun disappeared for a week?

Learn what would happen if the sun disappeared for a week. See more »

What if Earth lost gravity for five seconds?

Gravity keeps us snuggled up to our home planet, but do we need it? Learn what would happen if Earth lost gravity for five seconds at HowStuffWorks. See more »

What if Earth changed its orbit?

Space objects tend to be predictable, but what if our planet chose to experiment. Learn what would happen if Earth changed its orbit at HowStuffWorks. See more »

What if the Amazon rainforest was completely destroyed?

Rainforests are home to many unique plants and animals. Learn what would happen if the Amazon rainforest was completely destroyed at HowStuffWorks. See more »