Here are a few final additions to The Best Sites To Learn About Valentine’s Day:

From lonely hearts to electronic dating is an interactive history of matchmaking — from the BBC.

Freaky Ways Animals Woo Mates With Gifts is from Wired.

Hearts in Nature (PHOTOS) is from The Weather Channel.

Valentine’s Day 2013 is a photo gallery from The Atlantic.

I Love You in 130 Languages is an infographic.