Add Yahoo as a preferred source to see more of our stories on Google. Unfurling fiddlehead of the Christmas fern (_Polystichum acrostichoides_). Jacob S. Suissa, CC BY-ND Imagine a photograph of your ...

Imagine a photograph of your great-grandparents, grandparents and parents side by side. You’d see a resemblance, but each generation would look distinct from its predecessors. This is the process of ...

There is something otherworldly about ferns. Their fronds suggest feathers and wings, and so when looking at them you may think of taking flight, most likely into the pre-historic past when they ...