Please reference the first link on the main page ("Antarctic Glaciers Melting Faster Than First Thought") to answer the questions:
1. What did scientists find to be "unusual and unexpected" in their research findings?

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred