No matter how much research is done on the flora and fauna of our world, there will always be things that amaze us. Such is the case with the Scaly-legged Snail, also known as the Volcanic Snail, which is the only animal in the world that has iron in its skeleton.
This clam, also known as the Sea Pangolin, uses iron to build its shell and generate metallic scales that cover its flesh, essentially becoming a snail with a metal armor, making it the only living being with these unique features.
Apollo survival kit. Each Apollo mission was equipped with two rucksacks providing equipment to allow for crew survival for up to 48 hours on land or in the water after landing. This is one of two rucksacks flown on the historic first lunar-landing mission, Apollo 11, in 1969. It includes three water containers, one radio beacon with spare battery, three pairs of sunglasses, six packages of desalter chemicals, one desalter kit, two survival lights, one machete, and two bottles of sunscreen.
Astronaut John Young the only person to have piloted, and been commander of, four different classes of spacecraft: Gemini, the Apollo Command/Service Module, the Apollo Lunar Module, and the Space Shuttle. And he walked on the moon as well.