What is obesity? – Mia Nacamulli

The most basic function of bodily fat is self-storage of food reserves. In prehistoric times, natural selection favored genotypes that could endure harsh conditions by stocking the most fat. With chronic malnutrition being the norm for most of human history, genetics evolved to favor fat storage. So when did body fat become problematic? The negative…

How stress affects your brain – Madhumita Murgia

Are you sleeping restlessly, feeling irritable or moody, forgetting little things, and feeling overwhelmed and isolated? Don’t worry. We’ve all been there. You’re probably just stressed out. Stress isn’t always a bad thing. It can be handy for a burst of extra energy and focus, like when you’re playing a competitive sport, or have to…

The Humanwide Project: Pharmacogenomics

It is day three, two days after my surgery. My biggest fear was that I would have a bad reaction to the pain medication and I have not had one. Pharmacogenomics which very simply stated is the genetic influence on your drug response. What we envision in the future and what we’re doing now, so…

How People Have Evolved to Live in the Clouds

Thanks to Brilliant for supporting this episode of SciShow. Go to Brilliant.org/SciShow to learn more. ♪♪♪ Even the most seasoned mountain climbers can start to struggle at high altitudes. That’s because the higher you hike, the thinner the air gets. It’s literally less dense because it’s under less pressure, and that means you get fewer…