Earth
Somewhere in California lives the world's oldest tree
Japan's mysterious glowing squid
How cacti survive in the desert
Hanging bridges in Costa Rica's canopy
France's astonishing Verdon Gorge
How fireflies light up
Divers stumbled upon an extremely rare giant squid egg
Brazil: Cerrado's giant termite mounts
3 wonders found in the Philippines
The difference between a pebble beach and a sandy beach
This park in Croatia is a natural wonder
Ursa Major, one of the largest constellations in our sky