Carcinized clades are: sponge crabs, "higher" true crabs, porcelain crabs, hairy stone crabs, and king crabs. Decarcinized clade shown is the frog crabs. Disclaimer: AAAS and EurekAlert!

Outnumbered 14 to 1, two Israeli F-4s faced 28 Egyptian MiGs in an air battle that defied the odds. Discover the strategies, ...