Learn how the discovery of roads, terraces, and platforms covered by the thick jungle of the Machu Picchu valley may hint at a larger infrastructure surrounding the cultural heritage site.

Learn more about what researchers found at this ancient base camp and what it reveals about life at the time.

Learn more about hooded vultures, why they're important to the environment, and why they're so endangered.

Learn how a Minnesota farmer found a mysterious metal object in his field and why experts believe it could have fallen from space.

Learn more about a promising method for restoring bleached corals and its implications for the future.