British author and math enthusiast Alex Bellos tells me he's got more than 30,000 responses so far to his survey, What's Your Favorite Number and Why? As I said in a recent blog post, people are writing him from the Americas, Europe, Asia and Australia (Antarcticans, being mostly penguins, have shown little interest).
A spry 80-year-old cruises through the thick vegetation of western Borneo, or western Kalimantan, as it's known to Indonesians. Dressed in faded pinstripe slacks and a polo shirt, Layan Lujum carries a large knife in his hand. The chief of the island's Sekendal village is making his morning rounds.
Layan is a member of an indigenous ethnic group called the Dayaks, who once had a reputation as fierce headhunters. As on most mornings, his first job on a recent day is to tend to his rubber trees.
The next few days may tell us a lot about the case against Dominique Strauss-Kahn. The former International Monetary Fund chief is due back in court on Tuesday, and prosecutors in New York are weighing whether to go forward in spite of big questions about the credibility of Strauss-Kahn's accuser.
The man who will make that call is Manhattan District Attorney Cyrus Vance Jr. It may be the hardest decision he's faced since taking office 20 months ago.
The Obama administration on Thursday said it would review the deportation cases of 300,000 illegal immigrants.
The policy might make a difference to thousands of undocumented immigrants who came to the United States as children because the administration wants to put high priority on removing convicted criminals, and low priority on cases that involve people who pose no security threat.
Heavy two-way gunfire and mortar rounds have been heard in Tripoli, as rebels inch closer to the Libyan capital from the western mountains.
In the west, rebels control the road leading to the border with Tunisia. To the east, they control Misrata and Zlitan. Since taking the city of Gheryan, rebel forces have cut off the road from the south.
"Tripoli is essentially being strangled," says NPR's Lourdes Garcia-Navarro.