About 420 million years ago, the largest objects on Earth were not trees or even animals. In the Paleozoic era, strange organisms dominated the land, which are known in the scientific community as prototaxites. They looked like elongated cones about 8 meters high, and invertebrate creatures built houses inside them. Judging by the fossilized remains, algae grew on the surface of these mysterious objects. For many years, scientists could not attribute prototaxites to either trees or animals. But then they found evidence that these are huge mushrooms. In this article, we invite you to learn more about these prehistoric giants….