Brandon Terrell

Callie and Martina are two mice with almost nothing in common. Callie is a punk rock star in the big city who could use a little peace and quiet. Martina is a singing farm mouse with dreams of making it in the big city.

The game is on at the International TWIST competition! Finalists from around the world have gathered to match wits at the competition's remote lake camp in Ontario, Canada. One night the lead player, Reza Amari, tells a spooky campfire story about a monster and a man who disappears.

Bacterial infections are a constant threat to human health. Antibiotics stop a bacterial infection from multiplying. They help treat pneumonia, strep throat, and many other infections. But before antibiotics, treatments for these diseases were limited or misguided....

Earth is home to trillions of germs. But for most of human history, people didn't know germs existed! Healers of the past had different ideas about illnesses and their cures. They blamed illnesses on other causes and sometimes tried dangerous treatments....

For centuries, people misunderstood how the heart works. As our knowledge grew, heart surgery remained a dangerous medical procedure. Even after organ transplants become common, surgeons struggled to transplant hearts and keep patients alive....