Previously, research has shown that the first seeds evolved around 372 to 359 million years ago during the Famennian period. Fossils indicate that most of the seeds were covered by an extra ...

Fossilized seeds had been found in the mine before. While collecting samples in the mine, the team found some seeds they did not recognize, each 2.5 to 3.3 cm long, and without a cupule.

These are called non-flowering plants. Ferns and mosses are examples of plants which do not produce flowers. They grow from spores instead of seeds. Sexual reproduction in plants happens in a ...