Caution! The site can't guarantee, that text has age permission. The site is not recommended, if you are less than 18 years old.
The site shows example sentences for English words. How the word or phrase could be used in a sentence?
" ... When Charles R. Darwin published “The Origin of Species” in November 1859 geologists were still discussing the age of the Earth. Deep time was an essential prerequisite to explain the recent diversity of animals and plants by gradual and slow changes over time. Calculations, based on dispersal of heat from celestial bodies, however, suggested that the solar system was just some few million years old. Darwin didn’t address this problem in public, but he was convinced that the thickness of the stratigraphical column could only be explained by a very ancient Earth and the calculations of the physicists were based on wrong assumptions (radioactive decay, providing energy inside planets, and nuclear fusion, providing energy in stars, were unknown at the time). ... "