BBC Future takes the temperature of our planet – and the Universe – to find the hottest and coldest things ever measured.
How cold can it get on Earth? How hot can hot truly get? And, perhaps more importantly, what’s the ideal temperature a hazelnut souffle should be cooked at?
All important questions, and to find out the answers we’ve created the ultimate thermometer, which takes you from absolute zero to what scientists think is the absolute heat limit. Dress appropriately.