FossilA coiled shell from a fast-evolving group of ancient ocean animals.
Fossils • Minerals • Rocks
Explore 4.6 Billion Years of Earth
Discover amazing fossils, minerals and rocks, learn how they formed, and explore the story of our planet.
Presented by StefanStefan's RockQuestMade for Duncan, Kerem & friends who love discovering cool things about our planet.For Duncan, Kerem & friends
Pick a path
Choose Your Adventure
Start with the collection that catches your eye. Each path opens a different chapter of Earth's story.
Explorer guide illustrationMeet Your Guide
Hey, I'm Stefan.
I collect cool rocks, minerals and fossils and wanted a place where my friends and I could explore what they are, where they came from and just how old some of them really are.
Come explore with me. There's always another rock with a story inside it.
See Stefan's Cool FindsCollection highlights
Cool Finds
Six fascinating clues from oceans, crystal cavities and Earth's deep interior.
Fossil
FossilA remarkable fossil arthropod with a three-lobed armoured body.
MineralOne of Earth's most common minerals and a master of crystal shapes.
MineralQuartz coloured violet by iron and natural irradiation.
MineralA vivid green copper mineral famous for rings and flowing bands.
RockA coarse-grained rock made as magma cooled slowly underground.
Geological time machine
Travel Through Deep Time
Earth has been changing for billions of years. Jump into a geological period and discover what the planet looked like.
Illustrated world explorer