Frogs are remarkable creatures. They have mastered both land and water, and can breathe through their skins and their lungs. Some of them are so poisonous that just one tiny frog harbours enough toxins to kill ten people, while others hold the key to lifesaving medicines. Frogs have colonised some of the most challenging terrains on the planet, from the Arctic to the South African desert, adopting miraculous breeding strategies in the process.
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