Looking To Lizards To Reveal Grasslands’ History

Since Ophisops are restricted to grasslands, understanding the evolution of these lizards allowed the researchers to test two hypotheses related to the origins of Indian grasslands. The first hypothesis was that if Indian grasslands expanded at the same time as grasslands globally – which was four million to eight million years ago – the spread of Ophisops would date back to around roughly the same time period. The second hypothesis was if grasslands expanded only when humans started cultivation in the last 10,000 years to 20,000 years, Ophisops would have only spread to areas cleared by humans in the more recent past. (Click on title for full story.)