NPR Science Correspondent Richard Harris traveled to Australia's Great Barrier Reef to find out how the coral reefs are coping with increased water temperature and increasing ocean acidity, brought about by our burning of fossil fuels. Day 4: Richard catches up with one of the gurus of climate science out on the reef.

Ken Caldeira loves a challenge, and he has a big one right under his feet. He's standing on an expanse of coral reef out in Australia's Great Barrier Reef. It's being washed with water as the tide streams over the reef, from a lagoon to the open sea.

The chairman of the Federal Communication Commission announced during a staff meeting on Friday that he intends to step down "in the coming weeks."

Julius Genachowski's resignation comes just a day after Commissioner Robert McDowell announced his plans to step down.

The New York Times reports the Obama administration has not settled on a replacement for Genachowski. It reports:

What you do while you're asleep may say something about your cognitive function later in life.

Here's why. Mayo Clinic researchers report that having a condition called REM sleep behavior disorder, in which you act out dreams in your sleep, appears to be a harbinger for something called Lewy body dementia years later — at least in men.

The NCAA tournament got off to a stunning start on Thursday: Harvard, known more for its brains and seeded No. 14, sent No. 3 New Mexico packing with a 62-68 win.

Newly installed Chinese President Xi Jinping is following in his predecessor's footsteps by making Russia his first official trip abroad.

The visits by Xi and Hu Jintao before him (in 2003), both meeting with Russian President Vladimir Putin, reinforce how the Cold War rivals have grown closer as they seek to counter U.S. influence in Asia and Europe.

As a deadline on Cyprus to come up with a financial bailout plan nears, a possible rescue from Russia looks to have fallen apart, leaving the island nation few options for staving off default.

Russian Finance Minister Anton Siluanov said as far as Moscow was concerned "the talks have ended," but Prime Minister Dmitry Medvedev left the door open, saying aid from Moscow would be contingent on Cyprus gaining European Union backing for its other money-raising ideas.

NPR's Ofeibea Quist-Arcton reports from Lagos, Nigeria, on the death of one of Africa's greatest contemporary writers. Quoting his publisher, AP, CNN, and the BBC are reporting Chinua Achebe has died.

Chinua Achebe who taught at colleges in the United States made literary history with his 1958 best-seller Things Fall Apart, a sobering tale about Nigeria at the beginning of its colonization.

President Obama wrapped up his trip to Israel and the West Bank on Friday with visits to three symbolic pilgrimage sites: First he laid a stone on the grave of Theodor Herzl, the father of modern Zionism, then he laid a wreath and a stone on the grave of Yitzhak Rabin, the Israeli leader assassinated in 1995. Finally, Obama made a somber visit to the Holocaust memorial Yad Vashem.

The daily lowdown on books, publishing, and the occasional author behaving badly.

In Chicago, officials have released a long-feared list that places more than 50 schools on the chopping block. The public school district faces a $1 billion shortfall, and the mayor says many of the city's school buildings are half empty. Some angry parents and teachers say the plan will harm children and they'll fight to keep the schools open.