Someone asked “What are some really amazing animal facts?” and netizens shared the best ones they knew.

Whales and dolphins can literally fall half asleep. Their brain hemispheres alternate sleeping, so the animals can continue to surface and breathe. Tigers have striped skin, not just striped fur. The ...

Photographic reference with facts about twenty-five hundred animal species that detail animal habitats, life cycles, and conservation efforts. Includes glossary and separately paged section at the end ...