Is there a science to cuteness? Two-month old hippo Moo Deng joins a long line of animals celebrated for their appearance. Some think we are wired to care for big-eyed creatures.
Web goes wild for baby hippo Moo Deng
Tradition: Moo Deng (above) belongs to a noble tradition going back to 11th-century Japan and The Pillow Book of courtesan Sei Shonagon. Glossary
Pygmy - Used in names to describe animals and plants that are much smaller than more typical kinds.
Reddit - An American social news and discussion website. It has 1.66 billion monthly users worldwide.
Ritual - Something that is done the same way every time. Rituals are often religious.