MNN lists

The world's 10 oldest living trees

9 best train rides for exploring the national parks

8 of the coldest places in the world to live

9 trailblazing female explorers

Hairy Houdinis: 12 animal escape artists

13 glittering, record-setting gems to ogle

9 best rivers in the U.S. for a canoe outing

6 ways to sneak exercise into your workday

7 superlatively spooky forests

10 of the best ancient cave paintings

15 captivating photos of animals yawning (and why they do it)

5 surprising benefits of going braless