* Sea otters, the fuzzy mascots of California's coast, have fought back for 75 years from near-extinction, but now their population has mysteriously stalled. Scientists say pollution from land - perhaps even a parasite in cat litter - may be the culprit. * Call them demolition derby astrophysicists: NASA Scientists in Mountain View are building a spaceship they will deliberately crash into the moon in 2009, sending up a 40-mile high cloud of debris. Their goal? To find water for a future moon base.