Few mammals actually get periods every month, or even at all, but why? Understanding what menstruation really is and why it happens could help ease symptoms & treat conditions that stem from the reproductive system.

DISCLAIMER: I have very bad hitting form. Baseball was never my thing :)

NASA is launching a mission to send a probe into the sun, and it's the first to be named after a living scientist: Eugene Parker and the Parker Solar Probe! Astronomers have found another hot topic, and it's the hottest planet we've ever...

If you want to go out and start your own cemetery in the uK, says Alison Killing, "you kind of can." She thinks a lot about where we die and are buried -- and in this talk, the architect and TED Fellow offers an eye-opening economic and...

Women aren't micro--so why do they only get micro-loans? Reporter Gayle Tzemach Lemmon argues that women running all types of firms-- from home businesses to major factories-- are the overlooked key to economic development.

Picture this: you're working a shift in a hotel lobby when someone approaches the front desk. They found a lost wallet around the corner, but they're in a rush and don't have time to follow up. Looking at the wallet you see it contains a...

New Yorker cartoonist Liza Donnelly shares a portfolio of her wise and funny cartoons about modern life -- and talks about how humor can empower women to change the rules.

Zombies eat brains. They are also, like all of us, driven by brain functions. What is happening in their brains to make them act as they do? In this intriguing dialogue, Tim Verstynen & Bradley Voytek apply the various human medical...

Way more kids have fuzzy vision these days because we spend less time in outdoor light, which makes our eyeballs longer.

History has shown us that in moments of crisis, society can truly transform, says environmental educator Severn Cullis-Suzuki. Nearly 30 years ago, at just 12 years old, she spoke at the UN's Earth Summit in hopes of reversing the...

In this video Paul Andersen explains how the electrochemical gradient is a combination of the chemical and electrical gradient of ions. As ions move across a membrane the potential change creates a hidden force that isn't always apparent.

NASA has announced the scientific instruments for the Europa Clipper mission, and Cassini has passed Hyperion, the so-called “spongy moon,” for the last time.

An ode to tau in sonnet form.

Many researchers believe that all the water on Mars dried up, but some evidence suggests that it might have dried in.

We’ve talked about deviance more broadly, but today we’re focusing on crime, specifically in the US. We’ll start with legal definitions of crime and use FBI data to get an idea of the amount and kinds of crime committed in the US. We’ll...

To understand finance, search algorithms and even evolution you need to understand Random Walks.

How can a super-thin 3-inch disk levitate something 70,000 times its own weight? In a riveting demonstration, Boaz Almog shows how a phenomenon known as quantum locking allows a superconductor disk to float over a magnetic rail --...

In this video Paul Andersen explains how the angular momentum of an object if a product of the rotational inertia and the angular velocity. The rotational inertia depends on the mass, radius and shape of the rotating objects. A sample...

The FDA has approved a whole new class of antidepressant, and ultrasounds might be far more useful than we thought.

Civilians don't miss war. But soldiers often do. Journalist Sebastian Junger shares his experience embedded with American soldiers at Restrepo, an outpost in Afghanistan's Korengal Valley that saw heavy combat. Giving a look at the...

If you take a look at a map of Scotland, you'll notice an eerily straight line running through the highlands, this is the Great Glen Fault the product of half a billion years of time and geology.

Horse plus donkey — it seems like an unlikely combination. I mean, they're different species! And yet, when they get together, they can produce a mule or the lesser-known hinny. Either way, those offspring usually can't become parents...

Sometimes excitement can feel more like anxiety, and it turns out that they aren't that unrelated. Understanding the automatic reaction in our brains and changing our interpretation of the source might help us actually turn that anxiety...

Reuse of syringes, all too common in under-funded clinics, kills 1.3 million each year. Marc Koska clues us in to this devastating global problem with facts, photos and hidden-camera footage. He shares his solution: a low-cost syringe...