rarest The ingredients in the recipe for earthly life â water, elements associated with life, available sources of energy â appear to be almost everywhere weâve looked. Crazy Physics facts pt. Most players don't spend them either and only use them to purchase their way into META builds. Rarest Stamp; The rarest known stamp is the Treskilling Yellow stamp from Sweden. There are hypervelocity stars â which arenât shooting stars, by the way â and dust cloud that tastes like raspberry and smells like rum. In its most stable form - astatine-210 - it's got a half-life of just 8.1 hours, which means even if you did happen to stumble on some of it, half of it would be gone by the end of a work day. Johto has several powerful legendary and mythical Pokémon, but the three legendary dogs are the hardest to catch. 1. 20 Rarest And Most Expensive Materials On Earth - RankRed 24 Rarest of Rare Awesome Things Found on Earth Ever Rarest The most abundant element in the universe is hydrogen, which makes up about three-quarters of all matter! Diameter: 18 to 23 billion light years in diameter. The Hardest Thing To Find In The Universe? : Krulwich ⦠The coldest thing in ⦠2. As soon as players find them, Raikou, Entei, and Suicune, they scatter to undisclosed locations around the Johto region's map.