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The San Diego Wild Animal Park has recently re-christened itself the San Diego Zoo Safari Park. To go along with the new name are two adorable new residents of the park: Sumatran tiger cubs. But those baby tigers are actually part of a very serious effort to save the species from extinction. It's an effort Zoo curators are working to continue and expand.

Mussels hold tight to rocky seashores with the help of their strong but flexible "beards," or byssal threads. These threads are made of a sticky protein loaded up with iron that suggests a new way of making flexible but strong materials for industrial uses.

What began as a Harvard-only website is now the social networking tool of almost 500 million people worldwide. David Kirkpatrick examines the site's short history and its long-term potential in The Facebook Effect.

A new study out of UCSD suggests our genetic makeup influences how much we get involved in politics. The authors claim these are the first results to link specific genes to political behavior. We're

Japanese Prime Minister Naoto Kan said in a televised national address that there is a high risk of more radioactivity leaking from overheating nuclear rods at the crippled Fukushima Daiichi nuclear power plant.

Airs Sunday, April 4, and Sunday, April 11, 2010 at 8 p.m. on KPBS TV

The president uses a town hall-style meeting with university students in Shanghai to focus on human rights, one of the trickiest issues separating China's communist government and the United States. Later, President Obama met with Chinese President Hu Jintao in Beijing.

Colorado has trended toward electing Democrats in recent years, so you might think incumbent Sen. Michael Bennet would be well ahead of Tea-Party-backed Ken Buck in the polls. But he's not -- and he's emphasizing his moderate credentials as he tries to gain support from independent voters.

Culture Lust rounds up some of San Diego's best, most interesting, and most surprising art stories from the weekend so you've got plenty of material for this week's water cooler chatter.

For years, little was known about why babies died suddenly and unexpectedly in their sleep. But now, many of these deaths are believed to be preventable accidents caused by unsafe sleep practices. That's led some to question whether the term sudden infant death syndrome is still relevant.