The Washington Post, January 28, 2011

Link

In 1969, an astronomer named Jeremiah Ostriker realized that the Milky Way was spinning too fast. That may sound odd, given that it takes the sun 230 million years to make a full orbit. But when Ostriker tried to simulate the Milky Way on a computer, he found that it was spinning so quickly that it should have ripped itself apart long ago. There weren’t enough stars to hold it together.

Ostriker went to his fellow Princeton scientist James Peebles to share his puzzle. “There’s something wrong here,” Ostriker said to Peebles. The two scientists decided there could only be one solution: The stars we can see in the Milky Way are just a small fraction of the actual galaxy.

Continue reading “Richard Panek’s study of the cosmos, “The 4 Percent Universe”” →

That was fast–I was just on the Brian Lehrer Show on WNYC to talk about smiles, and they’ve already posted the conversation on their site. You can listen to it there, or right here:

A few minutes in, we talk about a mashup of Obama smiling in White House photos that’s been floating around (see below). When I pointed it out toPaula Niedenthal, my main source for my Times article  she likened his smile to the way we say hello on the phone. It always sounds the same, but that sameness doesn’t say much of anything about our emotional state.

Originally published January 26, 2011. Copyright 2011 Carl Zimmer.

Here’s a paraphrasing of an email I got this morning from Harvard biologist Naomi Pierce:

“I don’t know if you remember, but I mentioned a few years ago how Vladimir Nabokov, best known as a novelist, was also a self-taught expert on butterflies. In 1945 he had a wild idea about how his favorite group of butterflies evolved that no one took seriously. Well, for the past decade I and my colleagues have been scouring the Andes for butterflies and sequencing their DNA to test his hypothesis. And he turns out to have been right in all sorts of ways.

“Oh, and the paper will be published tonight.”

I got on the phone fast. And here’s my story on Nabokov’s last laugh in the New York Times.

[Update: here’s the new paper that vindicates Nabokov, and here’s his 1945 monograph [click on the pdf link for a free file!]. Check out his Nabokovian conclusion at p.44, plus his painstaking drawings of butterfly sex organs.]

Originally published January 25, 2011. Copyright 2011 Carl Zimmer.

Why is ScienceOnline a meeting like no other? Because it’s the sort of meeting where a biologist named Rob Dunn can set up shop in the lobby to ask for samples of bellybutton shmutz that he can analyze for biological diversity. Not only is it a place where such a person will not be hustled out by security, but it’s a place where a whole bunch of people respond by grabbing Q-tips to do their part for science. And you can bet every last bit of your bellybutton lint that I was right up near the front of the line.

Ten days later, my sample is now thriving nicely on a Petri dish, awaiting a more detailed analysis of its DNA. And here are the rest of the samples from the meeting.

All I can say is, #974, what is going on in there?

Originally published January 25, 2011. Copyright 2011 Carl Zimmer.