How does your immune system decide between fighting invading pathogens now or preparing to fight them in the future? Turns out, it can change its mind[1].

Every person has 10 million to 100 million unique T cells[2] that have a critical job in the immune

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Scientists very rarely get access to most sharks, the development of their young or the nursery grounds where they grow. So seeing a hammerhead shark[1] (Sphyrna tiburo) embryo, halfway through its five-month development, is very unusual.

Access to growing

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You’re probably familiar with classic sauropod dinosaurs – the four-legged herbivores famous for their long necks and tails. Animals such as Brachiosaurus, Apatosaurus and Diplodocus[1] have been standard fixtures in science museums since the 1800s.

With

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Curious Kids[1] is a series for children of all ages. If you have a question you’d like an expert to answer, send it to This email address is being protected from spambots. You need JavaScript enabled to view it.[2]. Why do bees have queens? – Rhylie, age 8, Rosburg, Washington When you think “bee,” you

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