If you've ever seen a movie like '2012' or 'Armageddon', or read the book 'On the Beach', you've probably envisioned some of the threats that could have killed our planet's life.
Crocodiles have been around for nearly 100 million years, thanks to their special biological characteristics and skills that help them adapt to climate change.
If disaster happens and humanity is wiped out, which species will follow us to dominate this planet?
Dinosaurs have dominated the Earth for over 160 million years, evolving into a variety of sizes and bodies suitable for different ecosystems.