However, Earth’s magnetic field almost collapsed 591 million years ago, and this change ... when the very first complex animals emerged on the seafloor as the percentage of oxygen in the ...

Imagine creatures that have survived since the time of dinosaurs. Species like the tuatara, sturgeon, crocodile, hagfish, ...

Imagine creatures so old that their forebears roamed Earth when dinosaurs walked ... has survived since over 200 million years ago and is considered a true survivor from the dinosaur's time.