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You might think that a turtle's shell is its snazziest feature, but their "third eye" is pretty darn incredible as well. In 2014, scientists published findings that addressed the pink spot that's located on the heads of leatherback sea turtles. The researchers discovered that in this area "the layers of bone and cartilage were remarkably thinner than in other areas of the skull," according to Science. "This thin region of the skull allows the passage of light through to an area of the brain, called the pineal gland, that acts as [a] biological clock, regulating night-day cycles and seasonal patterns of behavior." Therefore, the spot acts like a "skylight," which lets the turtles "sense the subtle changes in sunlight that accompany changing seasons, signaling them to return south when autumn approaches."

Dogs come in a range of shapes and sizes, all of which are cute. They also come in various colors—even green! In 2017 and 2019, "shamrock-colored" puppies were born. The greenish coloring, which eventually fades, is thought to be due to "the bile pigment biliverdin in the womb," according to IFL Science. "Biliverdin is a greenish color and can be found in bile, bruises, the placenta of dogs, and many other biological phenomena. Scientists have even found biliverdin in the shells of 6-million-year-old dinosaur eggs."

50 Amazing Facts We Learned in the 2010s — Best Life What a difference a decade makes. From animals to outer space to our own bodies, here are 50 amazing facts we learned in the 2010s.

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