Learn about why shaming people online often backfires; what caused GRB 190114C, the most energetic explosion ever observed; and how brushing your teeth can protect your heart.

“Man Vs Bear” host Casey Anderson explains why it’s important to put grizzly bears on TV. Then, you’ll learn about the real reason why people choose gifts — and it’s not to satisfy the giftees.

“Man Vs Bear” host Casey Anderson explains why grizzly bears are such fascinating animals, and the clever tricks they and other animals use to survive. You’ll also learn about “mast years” when trees sync their seed production.

Learn about whether you should avoid fever reducing drugs; why some dinosaurs replaced their teeth as much as sharks do; and how the smelling disorder “phantosmia” can make you hallucinate with smell.

Learn about why we drive on parkways and park on driveways; a flapping spacecraft that’s being designed to explore Venus; and why recalling a word on the tip of your tongue ensures that you’ll forget it next time.

Learn about why you don’t need to “warm up” your car, even when it’s freezing; fossils proving that Antarctica used to be covered in forests; and research that shows why buying less is better than buying green.

Lauren Black, Distinguished Scientist in the Scientific advisory services at Charles River Labs, shares the story of how doctors came up with a customized drug to treat one specific patient with Batten disease. Plus: learn about how you really can tell if

Learn about how replacing salt with MSG can actually help you cut back on sodium; the Hawking index, a mathematical measure of when people give up on books; and why giving too much advice might mean that you crave power.

Learn about why you should close the lid before you flush the toilet; the “planfulness” personality trait that makes you more likely to exercise; and how men and women have different attitudes toward their exes.

Learn about how you can discover history by going low-tech, from explorers Justin Fornal and Emiliano Ruprah, hosts of “Unexplained and Unexplored” on Science Channel. Then, learn about how nuclear explosions work in space.