The screwdriver was invented before the screw. See more

There are 206 bones in your skeleton. See more

Electricity doesn't move through a wire but through a field around the wire. See more

The can opener was invented 48 years after cans were introduced. See more

You will have to walk 80 kilometers for your legs to equal the amount of exercise your eyes get daily. See more

Astronauts grow taller in space. See more

Venus is the only planet in the solar system to spin backwards. See more

After billions of years, black holes become white holes and they spit out all the things they sucked up. See more

Calculating DNA length for each person, it would stretch across the diameter of the solar system. See more