rack one`s brains
to try hard to think of something or remember something
I have been racking my brains all day trying to remember the man's name.
Wondrous Whale Dance
A humpback whale breaches in the Channel Islands National Marine Sanctuary. A new study, published Aug. 16 in the journal Proceedings of the National Academy of Sciences, finds that to protect marine mammals like these gentle giants, humans need only set aside 4 percent of the world s oceans for conservation. The research found that just 9 conservation sites would protect habitat for 84 percent of all marine mammals species on Earth. The critical sites are off the coasts of Baja California in Mexico, eastern Canada, Peru, Argentina, northwestern Africa, South Africa, Japan, Australia and New Zealand.