Toddler rescued by puppy after 3 days in Russian wilderness

Vandals destroy famed 'Duckbill' rock formation

Did you know there are 8 types of glaciers?

Arizona man to live rent-free for life after selling home for $4M

Wildlife rangers put their lives on the lines with little support

The unlikely alliances created by 'Pokémon Go'

5 reasons why biodiversity is a big deal

Why is it so hard to create a national park?

Orchids 101: The biology behind these elegant flowers

12 types of waterfalls to see in your lifetime

Why we should be fighting for the 'Galapagos of North America'

Bucharest's new urban nature park is a 450-acre twist of fate