Sentences with «hundreds of thousands to millions of years»
Over hundreds of thousands to millions of years, the change in gene frequency has altered the physical aspects of the species as a whole. (religion.blogs.cnn.com)
After each mass extinction, it took hundreds of thousands to millions of years for biodiversity to build back up to pre-crash levels. (nap.edu)
Sedimentary rock layers provide a more compressed view of climate, as each layer of sediment is made over a period of hundreds of thousands to millions of years. (sciencedaily.com)