February 14, 2013
From Valentine’s Day 2013, one of 34 photos. African penguins receive valentines from biologist Crystal Crimbchin at The California Academy of Sciences African penguin exhibit in San Francisco, on February 13, 2013. The valentines will be used as nesting material. (AP Photo/Jeff Chiu)

From Valentine’s Day 2013, one of 34 photos. African penguins receive valentines from biologist Crystal Crimbchin at The California Academy of Sciences African penguin exhibit in San Francisco, on February 13, 2013. The valentines will be used as nesting material. (AP Photo/Jeff Chiu)