Guess the mystery animal by navigating the tree of life. Each guess shows where your animal shares a common ancestor with the answer.
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A daily organic chemistry puzzle. Work out the mystery molecule from the clues.
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Diagnose the patient from their symptoms and medical history. Can you crack the case before you run out of guesses?
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Guess the breed of the dog in the picture. Every wrong answer gives you a new clue.
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Find today's chemical element by swiping through cards with clues about its properties and position on the periodic table.
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The plant version of Metazooa. Guess plants and narrow down the family tree until you find today's mystery species.
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Yes, really. Guess the animal from a photo of its droppings. Gross, educational and weirdly addictive.
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Make the correct diagnosis from an X-ray, CT or MRI image, with extra hints unlocked after each guess.
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