Words similar to million-year-old

Example sentences for: million-year-old

How can you use “million-year-old” in a sentence? Here are some example sentences to help you improve your vocabulary:

[ 28 ] reported the isolation and growth of a previously unrecognized spore-forming bacterium (a Bacillus species, designated 2-9-3) from a brine inclusion within a 250 million-year-old salt crystal from the Permian Salado Formation.
In 2000, a team of United States researchers claimed to have cultured a bacterium sealed inside a 250-million-year-old salt crystal [9].
Scientists found a new candidate for the missing link between apes and humans . The 2.5 million-year-old creature, dubbed Australopithecus garhi , evidently used stone tools to carve up the animals it killed and had much bigger teeth than its apelike ancestors.
This beautifully organized museum, drawing on the most modern audiovisual techniques, is named after Joseph Tyrrell, the geologist who made the first discovery of Alberta’s 65-million-year-old dinosaurs while surveying coal seams along the Red Deer River in 1884.
The oldest rocks are 500 million-year-old slates found around the northern peak of Skiddaw, where the mountains have smooth and rounded profiles.