Why did it take cells so long to link together and form tissues, organs, you, me, turtles, daisies? There was a couple of billion year pause before cells became multicellular. How come? With brilliant designer Paolo Ceric, we consider this puzzle of life.
Think about the E.T. in "E.T." It was fetching, adorable and two and a half feet tall. Now think about the E.T.s we hope to find on Mars, Europa or Titan. They will probably be, if they are there at all, microscopic. I miss big aliens. Which is why I loved reading this science paper. Could big be back?
Spring comes, then summer, fall and winter and if you are off the planet with a camera looking down at Earth, the seasons seem like breaths. Speed up the imagery, and the planet seems to pulse, like a living thing. Take a look at what designer John Nelson has done. It's uncanny.
What happens when a vaguely bored bearded guy with nothing much to do, one day falls (or dives?) into his toilet bowl and goes down a sewer pipe? This comic is one of the most fantastic, coolest voyages on the Web.
You'd figure that mosquitoes, having been on our planet for the last 79 million years, would be really, really good at sucking blood. That's how they feed their young. Surprise! They're kind of bad at it. Today's feature: videos of mosquitoes missing veins and capillaries.
What happens when your brain plays a trick on you, and you can't not believe it? Our brains, it turns out, are not prisoners of the world we live in. We can, any time we like, create the impossible ... at least on paper.
This we know: that dinosaurs had babies. This we also know: that to have those babies, dinosaurs had sex. But here's what we don't know: with their size, their spikes, their scales, their genital equipment, how did they manage to do the deed? This doesn't prevent us from wondering.
Fake movie blood is for-real gross -- when we paid a visit to a special effects studio for our Blood episode, our executive producer nearly passed out. If you've got a weak stomach, don't look at these delightfully gruesome photos from our trip.
In the 1990s, a button-pushing New York artist took on a subject that cut him to the quick: HIV and AIDS.
Barton Benes had lost a lot of friends, including his boyfriend, and was himself HIV-positive when an everyday kitchen accident took on a surreal bent -- one that got ...
On certain nights, as helicopters settle on the sandy ground in Afghanistan, the air mysteriously bursts into loops of light that trace the path of the helicopter blades; no one's sure what causes this; no one knows what to call these dazzling light displays — but a war photographer has given them a name — and thereby hangs a tale.
If I say "meet me 28 miles from here," that doesn't seem very far, right? But what if the 28 miles is not on a road or a highway, but straight up? Take a trip with a space shuttle solid rocket booster as it tumbles back to Earth. Headphones on.
Car colors are getting cooler, even wintry: All over the world, car buyers are choosing white, silver, gray or black. So who favors warm, springtime colors? Think of a place where you spend half the year bundled up with mittens.
Professor William Barklow was on vacation when this happened. He was in Tanzania sitting on a river bank gazing about, when all of a sudden a hippopotamus pushed its head out of the river right in front of him, opened its huge mouth and bellowed.
You've got them... under your skin... Well, hopefully not. But if you did get infected with blood flukes, would it make you feel better to know they're monogamous creatures, pairing up and sticking together for years, sometimes even decades? Warms the heart.