Steven Novella

No skill is more important in today's world than being able to think about, understand, and act on information in an effective and responsible way. What's more, at no point in human history have we had access to so much information, with such relative ease, as we do in the 21st century. But because misinformation out there has increased as well, critical thinking is more important than ever. These 24 rewarding lectures equip you with the knowledge

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"Our predictions of the future are a wild fantasy, inextricably linked to our present hopes and fears, biases and ignorance. Whether they be the outlandish leaps predicted in the 1920s, like multi-purpose utility belts with climate control capabilities and planes the size of luxury cruise ships, or the forecasts of the '60s, which didn't anticipate the sexual revolution or women's liberation, the path to the present is littered with failed predictions...

The idea of using electromagnetism to heal has been around for centuries. Investigate how magnetic fields in objects like microwaves and cell phones work on our bodies, how healing is attempted through devices such as bracelets and pads, and how research shows that this curious form of medicine is scientifically unsound.

Diagnoses are the labels we attach to the signs and symptoms of particular diseases or illnesses. But not all diagnoses are equally valid. Here, learn how doctors make informed diagnoses and investigate several diseases that illustrate the controversy behind them, including chronic Lyme disease, chronic fatigue syndrome, and fibromyalgia.

Get a broader perspective on medical misinformation with this tour of myths from around the world, including South Korea (where sleeping with an electric fan on is thought to be deadly), parts of Africa (where it's believed that intercourse with a virgin can cure HIV infection), and Japan (where some believe personality is tied to blood type).

Another popular medical subject is antioxidants: substances in "superfoods" such as green tea that stabilize oxygen-free radicals. Discover what scientists have found about the potential for antioxidants to treat diseases such as Parkinson's and Alzheimer's, to prevent cancer and heart disease, and to promote longevity and lifelong health.

There are billions of bacteria around and inside your body, and some of them are actually beneficial to your health. Explore the truths behind probiotics: what they are, whether they help with issues like tooth decay and irritable bowel syndrome, and the future possibilities of genetically engineered bacteria.

Water is the most basic element of life. And yet there are many misconceptions about keeping your body hydrated. How exactly do our bodies regulate water? How much water should you really drink every day? Are expensive bottles of water and water purifiers worth the cost?

Carrying a baby low while pregnant means it's a boy. Never eat fish or drink caffeine while pregnant. Intercourse every 48 hours will increase your chances of conception. A whirlwind of misinformation surrounds the subject of pregnancy. Unpack many of the most common (and popular) myths in this episode.

Finish the series with a brief survey of "mini-myths," including that body heat is mostly lost through your head, that cracking your knuckles causes arthritis, and that eating turkey makes you sleepy. Afterward, take a moment to ponder the benefits of knowing how to sort through misconceptions and hype.