Topic: immune system

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Why do some people have seasonal allergies?

If you've ever experienced watery eyes, sneezing, runny nose, itchy throat, and other allergic reactions during springtime, or you haven't but you know someone who has, this beautifully animated TED Ed by Eleanor Nels...

What do baby sloths sound like?

Clinging and climbing at Sloth Sanctuary of Costa Rica, these baby sloths demonstrate their adorable squeaks. Animalist visited the sanctuary for Sloth Week in June, 2014 to interview sanctuary founder Judy Avey-Arroy...

Killer T cell attacking cancer

Watch this immune system defending T cell attacking a cancer cell. Alex Ritter, a PhD student at Cambridge, shot this “using an Andor Revolution spinning disk system with an Olympus micr...