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

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.