In many versions, it was either barren or icy, and often the home to huge crystals and crystalline structures. In others, it is a stable and fertile planet inhabitated with other forms of life, similar to the planet Earth. Krypton had many strange creatures (Such as glass-eaters and metal-eaters) and beautiful landscapes that simply don't exist on other worlds. The planet was destroyed late in its life due to internal pressures, and in some versions, the fact that Kryptonians were harvesting the planets core for energy. It has changed completely over the years while retaining many elements from its past. The destruction of the planet also created Kryptonite, radioactive chunks of the planet which are deadly to all Kryptonians.