Robert Krulwich

Forty-five years ago, this week, 123 million of us watched Neil and Buzz step onto the moon. In 1969, we numbered about 200 million, so more than half of America was in the audience that day. Neil Armstrong instantly became a household name, an icon, a hero. And then — and this, I bet, you didn't know — just as quickly, he faded away.

"Whatever Happened to Neil Whosis?" asked the Chicago Tribune in 1974.

I'm standing on a beach and I see, a few hundred yards out, a mound of water heading right at me. It's not a wave, not yet, but a swollen patch of ocean, like the top of a moving beach ball, what sailors call a "swell." As it gets closer, its bottom hits the rising shore below, forcing the water up, then over, sending it tumbling onto the beach, a tongue of foam coming right up to my toes — and that's when I look down, as the wave melts into the sand and I say,

"Hi, I'm from New York. But what about you? Where are you from?"

"I'm sitting next to a swimming pool and somebody dives in," says the great physicist Richard Feynman in a conversation recorded in 1983. Other people jump in as well.

They're odds. That's all they are. Not fate, just probabilities. Lauren Weinstein, cartoonist, is having a baby, and she's told — out of the blue — that she and her husband are both carriers of the gene that causes cystic fibrosis. They are sent to a genetic counselor. What happens next — told in five beautifully drawn, emotionally eloquent cartoons — tells what it's like to walk the edge for a few weeks. She's so many things (sad, funny, scared, puzzled), and then there's the ender. Take a look.

OK, I'm doing great science experiments. We've done sex (see previous post). On to lunch!

This is the story of a bird, a puzzle, and a painting. The painting, curiously, helped solve the puzzle, which is: How do vultures find food?

Done right, a good science experiment is simple, clear and revealing. Done splendidly, it's a tale you don't forget. Let's do the sex one first. It took place in Italy, in the 1760s, when a Catholic priest and scholar, Lazzaro Spallanzani, was thinking about sperm — which is why he decided to dress frogs in pants, like this ...

We live in a sea of air. It holds us, weighs on us, keeps us tethered. The earth, of course, holds us too, keeps us pinned. But not all of us. I want you to meet Storyboard P, a dancer who floats.