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Astronomer David Aguilar takes information about real exo-planets and dreams up the plants and animals that might live there.

Tuna, swordfish and other migratory fishes are being overfished by vessels on the high seas. A new proposal says we should close these international waters for a few years to let the fishes rebound.

Here's the latest bit of evidence that exercise keeps the brain fit. Much of the research has been in older people, but this study found that being fit in your 20s makes you sharper in middle age.

Thirteen years in the making, the Prison Rape Elimination Act is starting to have an impact. Texas Gov. Rick Perry says it's "ill-conceived," but many other states are adopting the law's standards.

Attitudes toward drug use continue to evolve. A new poll from the Pew Research Center shows that more people favor alternatives to prison for non-violent drug offenders.

Adam Lioz, of the public policy organization Demos, says that Wednesday's Supreme Court ruling will further empower a small, elite group of political donors. He offers a critical perspective on the ruling.

Baker's story is one that few others have experienced. After surviving a life-changing tragedy, the singer-songwriter relearned to play guitar and refined his quiet, powerful performance style.

Democrats in Washington, D.C., rejected scandal-plagued Mayor Vincent Gray's re-election bid, turning instead to a challenger three decades his junior and with appeal to the rapidly gentrifying city.

In practical terms, the Supreme Court ruling could mean more money flowing to political operatives and party committees.

Iran wants Hamid Aboutalebi as its new United Nations ambassador. He was among a group of Muslim students who 35 years ago seized American diplomats in Tehran.