What do phylogenetic trees illustrate? These diagrams don't just organize knowledge of biodiversity - they also show us that living species are the summation of their evolutionary history.

With this method, called cladistic analysis, you only compare a few carefully selected traits. For example, how would a scientist figure out evolutionary relationships between sharks, dolphins and ...

Satellite images from space are allowing scientists to delve deeper into the individual functions of different tropical forest canopies with new and surprising results. Understanding tree traits and ...