At Stanford Social Neuroscience Laboratory, scientists have spent years studying kindness, connection and empathy. But those can all seem in short supply at a time of deep divisions. But the head of that lab offers a data-driven reason...

An entire field of science is dedicated to identifying the perfect indoor temperature. And it's a lot more complicated than simply setting the thermostat to 21 degrees Celsius (70 degrees Fahrenheit).

Quantum mechanics gets weirder as you go to smaller sizes and higher energies. It’s strange enough for atoms, but positively bizarre when we get to the atomic nucleus. And today we’re going nuclear, as we dive into the weird world of...

The Sun is green, actually. We'll go into why the blackbody effect means the Sun emits more green visible light than any other color, and why evolution and color perception mean it's ok to see it as yellow, anyway.

On the genetic level, we're not all that different from chimps. But those small differences in DNA can have huge effects.

Psychologists consider nostalgia a complex emotion and it may have both benefits and risks.

We believe we should work hard in order to be happy, but could we be thinking about things backwards? In this fast-moving and very funny talk, psychologist Shawn Achor argues that, actually, happiness inspires us to be more productive.

Like positive and negative, or debit and credit, matter and antimatter are equal and opposite. So if matter falls down, does antimatter fall up? Chloe Malbrunot investigates that question by placing two atoms - one made of matter, and...

When it's time to play in the big game against your fiercest rivals, you might put on your "game face." But how much does this expression affect your opponents? And might you also be affecting yourself?

Do science at home with Hank in this episode of SciShow - you'll learn how to make your own litmus paper, what it's good for, and how it works.

Paul Andersen explains how changes in the genotype of an individual can affect the phenotype. He begins with genotype:phenotype::letters:story analogy. He explains how mutations can be neutral, beneficial or harmful. He also explains...

Paul Andersen explains how populations interact in an ecosystem. The symbiosis of several populations is based on effects that may be neutral, positive, or negative. Interactions like mutualism, commensalism and parasitism are...

In this video Paul Andersen explains how all objects contain positive and negative charge. Neutral objects contain an equal amount of positive and negative charges. Charged objects have more positive or negative charges. Like charges...

In this video Paul Andersen explains how the conservation of charge applies to objects in a system. When a charged object induces charge or conducts charge to a neutral object the net total of charge will not change. Grounding allows...

Paul Andersen explains pH as the power of hydrogen. He explains how increases in the hydronium ion (or hydrogen ion) concentration can lower the pH and create acids. He also explains how the reverse is true. An analysis of a strong...

Howcast - Let belly dancer Irina Akulenko teach you how to do chest circles in this belly dancing tutorial from Howcast.

Howcast - Learn how to take studio-quality pictures at home from professional photographer Chris Ryan in this Howcast video.

Howcast - Let belly dancer Irina Akulenko teach you how to do the belly dance move known as reverse undulations in this Howcast video.

Howcast - Let belly dancer Irina Akulenko teach you how to do the belly dance move known as a single hip vertical figure 8 in this Howcast dance video.

Howcast - Let belly dancer Irina Akulenko teach you how to do the belly dance move known as a reverse vertical figure eight in this Howcast video.

Howcast - Let belly dancer Irina Akulenko teach you how to do large hip circles in this belly dancing video from Howcast.

Howcast - Learn how to do eye makeup for a pinup look in this Howcast makeup tutorial with expert Patricia Longo.

Howcast - Learn the child's pose from certified yoga instructor Chelsey Korus in this Howcast video.

Howcast - Learn how to do head roll, shoulder roll, and hip roll isolations from jazz dance expert Liz Piccoli in this Howcast dance video.