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Scientists in Brazil have just discovered a creature that claims two small but fierce titles: the smallest known vertebrate and the smallest known amphibian. This raindrop-sized vertebrate earned a rather misleading name for itself — the “flea toad.” Use metric units to make and compare measurements and learn the differences between toads and frogs before discussing the misleading nature of the amphibian’s name.

On April 8, 2024, approximately 32 million people may have the opportunity to see a total eclipse of the sun. Astronomers predict this eclipse will put on quite a show — one of the most vivid in recent history. Learn how different factors of this solar eclipse will make it especially rare for both scientists and casual observers.

That old saying, "drawn like a moth to a flame," needs a revision. Many flying insects may appear to be captivated by the glow of a nighttime lamp. But things aren't always what they seem. The reality turns long-held assumptions topsy-turvy. New findings suggest that flying insects are not attracted to the light at all, but actually turn their backs to it. Learn how new evidence challenges old theories and hypotheses while answering questions and discussing how the evidence from such studies supports conclusions.

Being legal doesn't mean a drug is harmless. As the adult legal access to cannabis products goes up, teens' perception of cannabis risks falls. Learn how science reveals the harm THC may pose to teens while answering questions and discussing how the evidence from such studies supports conclusions.

Horns grant advantages to some lizard species but can be a liability to others. Learn how differences in hunting styles might contribute to physical differences in lizard species. At the same time, answer questions about evolutionary trees and convergent evolution while considering the value of analogies in helping understand complex concepts.

Every little bit of rest counts. For a chinstrap penguin, about 10,000 brief snoozes each day can add up to more than 11 hours of rest. Learn how these animals adapted to their environment by managing to grab this much-needed shut-eye. And they do it without relaxing their guard. Then answer questions discussing the relationship between habitats, behavior and sleep patterns.

Just when we all thought we had evaporation all figured out, clever experiments shine a new light on old assumptions. A new study points to light having the ability to help sever bonds (a type of intermolecular force) between water molecules to boost evaporation. Learn how these findings support new scientific claims and challenge the old notion that light affects evaporation only indirectly, through heat generation.

A surprise twist brings a Möbius strip mystery to an end. So simple in structure yet so perplexing a puzzle, the Möbius strip's twisted loop grants some unexpected turns. Learn about what a Möbius strip is by constructing them from paper and tape, then use these deceptively simple structures to challenge intuitive judgments about their construction ratio limits.

Astronomers just spotted a big explosion. Scientists studied this glowing afterburn of pulverized planets — comparing infrared and visible light — to peel back layers of space and time. They also answered questions about how probability can be used to draw conclusions and assess scientific claims.

Colliding tectonic plates might make your diamond blush. Learn how differences in crystal structure give rise to distinctive physical differences, such as the rare pink diamonds of Western Australia. Answer questions about the value of skepticism in science and discuss how uncovering the history of our planet can give us a treasure-hunting lead.

This little snake’s “big gulp” puts 7-Eleven to shame. Stretchy tissue in the snakes’ jaws enables them to swallow prey much wider than themselves. And the Gans’ egg-eater snake takes the cake — or egg — for most outsized meals. Learn how snakes gulp down meals much bigger than themselves while answering questions discussing proportions and comparing relative values vs. absolute measurements.

Artificial intelligence, or AI, provides a new way to focus a camera’s lens! Researchers have now used AI to overcome limitations in thermal-imaging technology — and they didn’t stop there. Learn how applying this AI to existing technology, such as self-driving cars, might solve safety problems and help transform what had been science fiction into reality. Apply knowledge to new applications and answer questions that confront the nuance sometimes lost by dichotomies as literary devices.