Why are there no lemurs in Africa today?

Lemurs are native only to Madagascar, where they evolved in isolation for millions of years. They were part of the diverse fauna that once inhabited the supercontinent Gondwana, but after Madagascar separated from Africa around 160 million years ago, lemurs became isolated from their relatives. This geographic isolation led to their unique evolutionary path, and today, they are found exclusively on Madagascar. As a result, there are no native lemurs in mainland Africa today.