There are many mysteries around fever, but we do know that all mammals, some birds and even a few invertebrate and plant species feel fever's heat. It has persisted for over 600 million years of evolution. But it has a significant cost:...

Some people who get sick with COVID-19 don't feel any symptoms of the disease, but what does an asymptomatic COVID-19 infection look like?

Why can you usually stay healthy while you’re going through a stressful situation, but then you get sick right after?

Bats are amazing and not just because they're the only mammal that can fly! But they also carry a lot of diseases that are dangerous to humans, and while that is definitely not their fault, there is actually a lot we can...

In the early days of the space race, agency researchers in Russia and at NASA really weren't sure all what would happen to an astronaut in space. They didn't know if a human mind could handle actually seeing Earth or what would happen to...

What if we treated the risk of pandemics the same way we treat the risk of fires? In this eye-opening talk, infectious disease epidemiologist Jennifer B. Nuzzo unpacks how the Great Baltimore Fire of 1904 sparked a cultural shift in how...

Are you sneezing more as it gets nicer outside? Jessi and Squeaks talk about allergies, and explain what your body is going through!

When a baby is born, so is a mother -- but the natural (and sometimes unsteady) process of transition to motherhood is often silenced by shame or misdiagnosed as postpartum depression. In this quick, informative talk, reproductive...

Wearing a mask is a cheap and easy way to help stop the spread of airborne infections like COVID-19. It’s also a sign that you want to help protect other people and have them protect you… that we’re all in this together. Here’s some...

In the first video in our two part series on HIV and AIDS, we explain how scientists figured out what HIV is, when the infection morphs into AIDS, and where they think the virus originated.

If you've received a vaccine that's 95% effective, that does not mean you have a 5% chance of getting sick. That’s just not how the numbers are calculated. So let’s take a closer look at how it does work, why we can’t compare these...

Unlike measles, Influenza requires a fresh shot of vaccines every year. But why?

Jessi is about to go to the doctor's to get a vaccine and she's sort of nervous. But she knows that vaccines are really important, so she learned all about how they help us stay healthy! Now she wants to share what she learned with you!

Medicine has made leaps and bounds in treating illnesses in the last century, but are they ever going to get around to curing the common cold? We might be closer than you think.

Germs are found on almost every surface we come in contact with, which makes it incredibly common for our bodies to be exposed to them. But why are some of these germs relatively harmless, while others can be fatal? Yannay Khaikan and...

Squeaks has a doctor's appointment coming up and he's a little nervous, so Jessi asked her friend Dr. Arron Carroll to come over and talk about what happens when you visit the doctor!

Dr. Ivan Pavlov's groundbreaking work revealed that a dog will respond to neutral stimuli, such as a bell, in the same way that it will respond to, say, mouth-watering food. This research is widely applicable beyond a dog's salivation....

You might have faked being sick to avoid doing something unpleasant. However, for people with the factitious disorder, faking illness isn't quite so straightforward.

If you’ve ever noticed that being sick often sucks more at night, that wasn’t your imagination. Fevers do often rise at night! Why do our bodies do that? Is there a reason we have to suffer more?

Most of us have experienced food poisoning, but with 31 unique species of bacteria, viruses, and parasites as common culprits, it's hard to know exactly what it is.

As 18th-century science and medicine brought properties of electricity to light, some Victorian doctors decided that putting sick people in a bathtub and shocking them might be a good idea.

Across the southeastern United States, bald eagles have been dying unexplainedly for the past 25 years. In March of 2021, researchers announced that they had found the killer, and they hope we can use this knowledge to better protect...

It can be easy to take for granted the fact that there isn’t formaldehyde in your milk.

In ancient Kyoto, a Shinto scholar found himself distracted from his prayers and sought to perform a purification ritual that would cleanse him. He decided to travel to the revered Hie Shrine; walking the path alone, ignoring any...