Alpha · Android

Help shape Factcovery — keep Premium forever

Join the alpha, lock in lifetime perks before launch.

  • Premium forever
  • Zero ads
  • Live feature drops
Get early access
Paleozoic EraTopic

Paleozoic Era

1 fact

Explore the Paleozoic Era, a time of incredible ancient life! Discover major evolutionary leaps from marine invertebrates to early vertebrates and the first land plants.

  • Scorpio88 views

    Scorpions Are Ancient Arachnids Dating Back 430 Million Years

    Fossil records indicate that scorpions are among the oldest known terrestrial arthropods, having evolved from marine ancestors. Early scorpions possessed gills and adapted to land environments during the Silurian period, predating dinosaurs by hundreds of millions of years.