Follow inherited change across generations, trace carbon from a leaf into a meal, and connect the systems that keep organisms alive.
Interactive explorationMeet two real peppered-moth forms. Follow survivors, trace inherited copies into offspring, and replay a population under different conditions. Compare the teaching model with what researchers actually measured.
Interactive explorationMatch two kinds of fiber to the microbes that can use them. Look through a bacterial surface, inspect a real enzyme holding a sugar chain, and sort the different kinds of products that microbes can make.
Interactive explorationOpen a leaf, explore a chloroplast, and supply a tiny carbon-building recipe. Discover what comes from air, what comes from water, and what light contributes.
Interactive explorationFollow a meal through the gut, then zoom into its lining. Choose starch, protein or long-chain fat and discover why their next routes differ.
Interactive explorationTurn a real anatomical model in your hands. Reveal its chambers, meet the four valves, then follow the blood moving through both sides of the heart.
Interactive explorationMove through a breath, connect space to airflow, then cross the tiny boundary where oxygen enters the blood.
Interactive explorationStart with a vibration. Follow air, eardrum, tiny bones and hair cells, then see why the message reaching your brain is a different kind of signal.
Move a load closer to an elbow on a transparent teaching arm. See the force change, then explore how muscles can work without visible movement.
Take these steps at your own pace. Your place is not saved as account progress or scored.