In fact, ferns grew prolifically in the Carboniferous period that occurred millions of years ago. However, for the modern-day ...

Carboniferous coal was produced by bark-bearing trees that grew in vast lowland swamp forests. Vegetation included giant club mosses, tree ferns, great horsetails, and towering trees with strap ...

In the Carboniferous Period, 359 to 299 million years ago, plants grew in swampy, green bogs that over time became the coal deposits we use today as fossil fuels. Among the plants that grew back then ...