High School

Would you like to set foot on Mars one day? Humans have dreamed about exploring other planets, moons, and asteroids for decades, but the furthest we’ve gotten is Earth’s own moon. In this lesson, [...]

Darwin himself wrote of eyes, "The difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, should not be considered [...]

Thanks to so-much-evidence-it's-silly as well as, well, our own senses, we all know climate change is happening. We also know that we need to develop solutions to help us mitigate and slow the [...]

Have you ever stopped to think about how odd humans are? Not, like, in general, but biologically? For one thing, very few other animals walk the way we walk, on just two limbs. Our closest living [...]

Natural history museum collections house some truly odd things, from random bits of fossil and bone to whole organisms preserved forever in jars of icky liquid. In this lesson, a team of [...]

Have you ever seen a headline like, "Planet a zillion* kilometers away has water vapor in its atmosphere!" and wondered how do they know that? Turns out the answer is pretty simple: Light! Turns [...]

As traditional carbon-based sources of energy are dwindling, it's easy to cheer for solar and wind power to seize the moment and drag us out of the climate crisis bed we have made for ourselves. [...]

The rules of sexual inheritance are simple, right? Half the genes from parent one, the other half from parent two and bada-bing! New organism. What if we told you there is an exception to that [...]

Newborn babies have very immature immune systems, but they aren't completely defenseless against disease. Some antibodies pass from the parent's blood to the fetus' blood during development. But [...]

Looking at a wolf and a German shepherd, it is easy to think: "Sure, related." But what about a wolf and a Pekinese? Have you ever seen those dogs? They look like adorable walking footstools! [...]