You Won't Believe These Astounding Nature Photos Are Real

Tetraodontidae

These mysterious circles on the seafloor are not caused by aliens—it's actually pufferfish hoping to snag a new mate. Divers first noticed the structures near Japan's Amami-Oshima Island about 20 years ago. Nobody knew what was creating them until recently when scientists discovered that male pufferfish spend about 10 days carefully constructing and decorating the structures to woo females.

Advertisement

Next Page →

The More You Know

  • One area of Canada has a weaker gravitational pull than the rest of Earth.
  • The fastest gust of wind ever recorded on Earth was 253 miles per hour.
  • "E" is the most common letter and appears in 11 percent of all english words.
  • Video games help surgeons perform better.
Next Page →