13. Dolphins Have Names For One Another

It had been-long suspected that dolphins use distinctive whistles in much the same way that humans use names.

14. Vending Machines Are Twice As Likely To Kill You As a Shark Is

The yearly risk (in the United States) of dying from a shark attack is roughly 1 in 250 million. In contrast, the yearly risk of dying from a vending machine accident is roughly 1 in 112 million. The vending machine is indeed roughly twice as lethal as the shark.

15. A Venus Day Is Longer Than A Venus Year

It takes 243 Earth days to rotate once on its axis (sidereal day). The planet’s orbit around the Sun takes 225 Earth days, compared to the Earth’s 365. A day on the surface of Venus (solar day) takes 117 Earth days.

16. During The Night, Your Intervertebral Discs Relax And Expand

These discs allow for movement, flexibility, extension, and rotation in the spine. When you sleep, your spine is no longer subjected to the pressures of gravity, and your body is able to replenish lost fluids between your intervertebral discs, which stretch and relax. The excess fluid provides up to a half inch more of height upon waking.

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