evolutionary relationships), they are able to construct more and more accurate tree diagrams. But how do they figure out relationships between living things?

These living things, whether they be ancient trees ... serving as living records of the natural world. One such living relic is a tree in the US that dates back to Egyptian civilization. In eastern ...

Trees and animals are living things. Dry leaves on the ground are dead, but they were once part of a living tree. The bones of a dead animal were also once part of a living thing. A non-living ...