Praearcturus gigas was a meter-long Devonian scorpion whose size may reflect a world with few large competitors rather than high oxygen alone.
Life reconstruction of Praearcturus gigas. Credit: Franz Anthony
Praearcturus gigas was a meter-long Devonian scorpion whose size may reflect a world with few large competitors rather than high oxyg… [+6187 chars]
Praearcturus gigas was a meter-long Devonian scorpion whose size may reflect a world with few large competitors rather than high oxyg… [+6187 chars]