Nature's Biggest Beasts

When you're this tall, getting a drink of water can be challenging. With their high blood pressure, one would think giraffes should get a head rush when they bend down to drink from a watering hole. Luckily, their anatomy is tailored to combat this very issue.

On nights when the perfect tide conditions, day-length and sea temperature all align, some 400 species of coral across 3,000 reefs reproduce by releasing their eggs and sperm simultaneously. This ultimately helps grow the world's largest living structure - the Great Barrier Reef.