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16ApO TIL There’s enough gold inside Earth to coat the entire planet in 1.5 feet (45.7 cm) of gold. 99% of the precious metal can be found in the Earth's core.
KYgW4 TIL The cornea is one of only two parts of the human body without blood vessels. The cornea is the clear part of the eye that covers the pupil and other parts of the eye. It gets its oxygen directly from the atmosphere. The other part is cartilage.
wojMJ TIL The cornea is one of only two parts of the human body without blood vessels. The cornea is the clear part of the eye that covers the pupil and other parts of the eye. It gets its oxygen directly from the atmosphere. The other organ is cartilage.