Animal Eyes

Turritopsis dohrnii is known as the “immortal jellyfish.” Found in temperate and tropical waters, the species is able to revert its maturation process once it has completed it. Theoretically, the jellyfish can repeat this process indefinitely, thus never dying of age.

St Louis’s Gateway Arch is a 630-foot-tall monument that required an incredible level of exactitude. The monument’s two legs were erected separately, and if their measurements were off by as little as 1/64th of an inch, they would not have been able to join at the top. Many people suspected the structure would fail when the last piece was put in place, but fortunately, it didn’t.

Nebulas are where stars are created in our universe. Gas, dust, and other materials clump together to form stars, with planets being formed out of the remaining materials. “The Pillars of Creation” is a photograph taken by the Hubble Telescope, showing this process in action.