Soaring above Sri Lankan skies, the Sigiriya palace reminds us of the rewards--and costs--of power.

The origins of HIV have become an object of speculation for decades. Scientists are finally putting the pieces together, and the story is quite surprising.

In the 1990s, the Galapagos Conservancy launched Project Isabela, an all out war against 250,000 goats in the Galapagos Islands to save the dwindling population of Galapagos tortoises.

Whale sharks are the subject of international mythology for a reason. Get to know them here.

Today, obesity is not so much a rarity as it is an international epidemic. 100 years ago, being the world's largest couple meant belonging to a circus.

Most people skip over the Philippines when they think about stunning Asian landscapes. The Philippine Rice Terraces remind us why that thinking is wrong.

The Uruguayan president worked to reduce inequality without sacrificing economic growth or free speech, and these José Mujica quotes show why he's still revered as a catalyst of change in Latin America and beyond.

Salvador Dalí left Catalonia for Madrid in 1922. These vintage Spain photos give us a peek as to what he might have seen in the capital city.

Bionic skin is becoming less of a sci-fi feature and more of a reality. But just how far do we have to go?

As these breathtaking European natural wonders show, there's more to the Old Continent than just slanted buildings and outdoor cafes.

As Mainland China wealth continues to enter Hong Kong and wages remain stagnant, the Hong Kong housing crisis isn't likely to improve any time soon.