Krulwich considers the strange powers, and brilliant hue, of horseshoe crab blood. Read the full post here.

Robert puzzles over why sunsets on the Red Planet are blue. Find out why, and take a look at some photos and an animation from NASA.

Robert gapes in wonder at the doodling prowess of self-proclaimed math geek Vi Hart. Read more, and watch Vi's blazing pencil in action.

Robert and Carl Zimmer teamed up tonight to moderate a brain mapping brouhaha live at Columbia University. The subject: does the brain's wiring make us who we are? The event has ended, but thanks to everyone who tuned in for the live webcast (and the lively web chat archived below).

Robert considers the solitude of discovery, versus the grand public statements we tend to expect will spring from the big moment. And he recounts one famous instance--when humans first reached the deepest place on Earth--when no words came.

Robert considers the spooky invisibility of magnetic force, and describes the push and pull that a pair of artists encountered while trying to depict it on film. Read more here.

This Is Yesica, the tipsy one on the right. She's a Sports Illustrated Swimsuit model from Argentina. She is very nice to look at.

Here's the riddle.

He was old, but not ancient, the man next to us at the delicatessen. It was 1973. My then girlfriend (now wife) and I had ordered dinner and this old guy, sitting by himself, seemed lonely, so we got talking and he told us how he had grown up in St. Petersburg, Russia, and that when he was a boy, his next-door neighbor was a famous man, a really famous man.

It's not like it hasn't been done before; it has. The problem is, it is so easy now, anyone can do it, and we'd never know because the tools are so subtle. I'm talking about doctored pictures — manipulating images, or what simpler folks call "lying." There used to be a saying on the Web: "Pictures, or it didn't happen." No more.

Look at this animal. ... What do you see? Or more importantly, what don't you see?

Here's something you should know about yourself. Vowels control your brain.

He? She? It? Whoever it is, the Phantom Sculptor is suddenly back!

They don't have towels. So when they get wet, what do they do? They shake themselves into a frenzy and the water flies off like this:

A post from Robert's excellent Krulwich Wonders blog.

One night, somewhere, they won't say where, but I'm guessing it was a Manhattan loft with a big kitchen, a food anarchist named Mike Lee got 40 people to perform a daring experiment in food camouflage.

I love illusions, where your brain makes weird things happen. Those of you who come here often have seen some doozies, but this one ... oooh, this is one of the strangest.

Little kids love dinosaurs, bugs and exploring the woods. Science doesn't scare them; they find it fun — until 9th grade. That's when most of us take our first biology class and everything changes. That's when we learn, not because we choose to, but because we know it might be on The Test, and too often, curiosity gets replaced by fear.

A post from Robert's excellent blog Krulwich Wonders. Read all his Krulwich Wonders posts here.

A post from Robert's excellent blog Krulwich Wonders. Read all his Krulwich Wonders posts here.