Partial remains of two skeletons were discovered in a cave in South Africa, and some scientists think they may be another addition to humanity's evolutionary tree.

The sheer girth of certain ancient, wizened trees can take one’s breath away. Wired Science recently featured a collection of images of some of earth’s oldest trees. Although the age estimates given for these antique specimens vary from a few to tens of thousands of years, the majority of them are consistent with a biblical timeframe for earth history.

From salt grass to sassafras, flowering plants dominate earth’s landscapes, and many plant fossils are of leaves, bark, and pollen grains. The rock layers that contain them are most often found atop layers that have non-flowering plant fossils, like gymnosperms.

Before a long migration, certain birds shift from an insect diet to eating fruits such as berries. Researchers once thought that this added carbohydrate reserves as fuel for the journey. But a new study out of the University of Rhode Island suggests that the birds are interested in the fruits’ antioxidants, not their sugars.