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Giant wombats, short-faced kangaroos and the largest land lizard to ever have lived are just some of Australia’s megafauna. These large animals have mostly gone extinct. However, the cause of their extinction is still a matter of debate.

Say cheese and flash that beautiful smile. You should be proud of those choppers; after all, teeth have been around for nearly half a billion years.

Written by Emma Bastian How do you weigh a dinosaur? It’s a simple question with a very complex answer.

Looking for something to do this weekend? Play the time walk board game. You can download and print the instructions, game pieces and  board. Let us know what you think! If you’re after more science fun for kids, subscribe to Double Helix magazine!