Age of Ice

Archeologists find footprints (in one case literally) of prehistoric people in Britain from different ages, waves and paleontological qualifications, as early as 5000,000 BC, including Neanderthals and even an earlier, distinct species. Homo sapiens arrived only the latest 31,000 years, but also in different waves, due to extremely variable climatological and geological conditions, mainly the stages of the latest Ice Age.