Daily Roundup: April 15, 2011

Massive Apology: The president of the Tokyo Electric Power plant apologized to the Japanese people and promised to compensate those who were forced to evacuate during last month's nuclear fallout. Guardian

Cetacean Songs: The songs of humpback whales change from year to year, indicating that their communication may be more complex than previously thought, says a new study. Wired

Switching Gears: The U.S. departments of agriculture and energy announced a $30-million investment into advanced biofuels and bio-energy projects over the next four years. New York Times

Don't Forget Pets: Volunteers are entering Japan's nuclear danger zone to rescue animals that were left behind during the mass evacuations. CNN

Bulk Wattage: Costco will begin selling home solar-power kits on its website, ranging from 880 to 5060 ready-to-install wattages. Huffington Post

--Rosie Spinks