Father-daughter duo find 2-carat diamond in Arkansas state park

Washington, D.C.'s winning 'Memorial for the Future' is as sobering as it is beautiful

Earth gets a surge of new ocean sanctuaries

Why would militants take over a wildlife refuge?

Wild manul cubs caught on video in Mongolia

The ambitious plan to 're-stitch' Atlanta's urban core

Minneapolis launches public kayak-share program

Lucille Ball Memorial Park gets the non-terrifying statue it deserves

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

New Zealanders harness the power of crowdfunding to turn a private beach public

Manhattan's underground park may finally see the light of day

Why is it so hard to create a national park?