Determine the number of years both Andrewsarchus and Brontotherium existed together - AQA - GCSE Biology - Question 8 - 2020 - Paper 1

Andrewsarchus existed from approximately 38,500,000 years ago to 36,000,000 years ago. Brontotherium existed from about 38,500,000 to approximately 25,000,000 years ago. To find the years they both existed together, we identify the overlapping period: from 38,500,000 years ago to 36,000,000 years ago.

Therefore, the time they existed together is:

$36,000,000 - 38,500,000 = 2,500,000$ years.