system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are so many creatures in places like South America and Australia venomous and dangerous, as opposed to the UK or europe?
gpt
South America and Australia simply have more species of animals. More species means a wide variety and so you're more likely to find dangerous ones. There's also plenty of completely harmless animals in these places but they just don't make the news as much.

As to why these regions have more species there are many reasons but most people agree that the ice ages played a part. Europe and North America were cold and inhospitable for thousands of years, whereas the areas around the equator were fine, giving life a much better environment to evolve into the plethora of species we see today.