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When we look at a very bright object and then look away from it, why do we still see the object’s outline?

We’re celebrating recycling in this quiz! Can you salvage a passing score, or will you end up in the garbage?

We humans only have 2 legs, but a lot of creatures have many more. Do you have the legs to go the distance and get 5/5 on this quiz?

Open the large sliding cabinets to shelves, stacks and pigeonholes. In front of you is a plant collection with nearly a million different specimens. But what’s with the conveyor belt?

September is Biodiversity Month. Celebrate by taking this quiz about the variety of life you’ll find here on Earth. How biodiverse is your knowledge?

If you get bored eating the same thing over and over, spare a thought for dogs. Many pet dogs eat the same thing every day, week after week. And a change in food can be abrupt – empty the old bag of dog food, and start with something brand new. But how long does it take a dog to adjust to a new diet?

Here are 5 fresh questions to juggle for this week’s quiz. Will you score high, or come crashing to Earth?

Australia has many amazing land snails. There are currently about 1,500 described species and another 1,000 waiting to be named.

This quiz explores science’s softer side. Will your score leave you feeling warm and fuzzy?

We had our eyes on the skies as we wrote this quiz. Can you reach for the stars or are you coming back down to Earth?