When Earth Was Ruled by Monster Insects⁠

If prehistoric insects were the size of cars, we would likely not be breathing today. Explore why physics limits the scale of life. Our planet has undergone massive shifts in atmospheric chemistry that dictated the size of creatures throughout time. When we look at the biological constraints of oxygen levels, it becomes clear why modern bugs stay small. A simple calculation regarding gas exchange and surface area shows that the massive arthropods of our imagination would struggle to survive in our current environment. This video examines the geological layers that reveal how atmospheric pressure and oxygen availability have changed throughout earth history. By analyzing fossil records and physical laws, we can understand the hard limits placed on evolution. It is a sobering reminder of the specific conditions required for complex life to thrive on our planet. Subscribe to Geofable for weekly explorations of the untold stories of our planet's past. 0:00 - Monster Bugs on Earth 0:45 - The Oxygen Factory (Lignin Explosion) 2:10 - Tracheal Systems & Insect Giants 3:40 - Arthropleura & Meganeura in Action 5:05 - The Mega-Firestorms & The White-Rot Fungi 6:20 - The Silent Extinction #earthhistory #carboniferous #prehistoric #evolution #science #animation