All Things Considered on HD2

Ethiopia's prime minister, Meles Zenawi, has died. He was 57 years old. Meles was reportedly being treated at a hospital in Belgium. He came to power after leading rebels and overthrowing the country's dictator in 1991. He was a key U.S. ally in the war on terrorism, but was also increasingly authoritarian.

Cities may be the defining element of human civilization.

The path from hunter-gatherers in the Paleolithic era 25,000 years ago to the high-tech, high-wonder jumble we inhabit today runs straight through cities. In traveling that path, our construction of cities has always been a dance with physics. In some cases, that physics was explicitly understood; in others, its manifestation was only recognized in hindsight.

As our cities have become more complex the physics embodying their behavior and organization has also become more nuanced, subtle and profound.

Today at All Things Considered, we continue a project we're calling NewsPoet. Each month, we bring in a poet to spend time in the newsroom — and at the end of the day, to compose a poem reflecting on the day's stories.

Pretty much every smartphone on the market today offers GPS. Apps of all kinds use that geo-locating ability to offer you the local weather forecast or help you find nearby restaurants.

There are also apps designed to help singles look for love, and the concept has been a hit — with men. The app Grindr, for gay men, has more than 4 million users worldwide. And straight guys are signing up for a bunch of dating apps, as well.

Wind and solar get lots of attention, but another kind of renewable power actually creates more energy in our country --wood. The state of Massachusetts on Friday decided that these plants aren't green enough to get some special breaks.

A queen of comedy has died. Phyllis Diller had audiences in stitches for more than five decades with her outlandish get-ups and rapid-fire one-liners. She died at her home, where she had been in hospice care after a fall. She was 95.

Diller was glamorously outrageous — or at least the character she created was glamorously outrageous, the one who wore wigs that made her look like she had her finger in an electrical outlet, who wore gaudy sequined outfits. She was known for her laugh and those nasty jokes about her dimwitted husband, "Fang."