CORVALLIS, Ore. -- Researchers at Oregon State University have discovered the oldest bee ever known, a 100 million year old specimen preserved in almost lifelike form in amber, and an important link to help explain the rapid expansion of flowering plants during that distant period. The findings and their evolutionary significance are outlined in an article to be published this week in the journal Science. The specimen, at least 35-45 million years older than any other known bee fossil, has given rise to a newly-named family called Melittosphecidae – insects that share some of the features of both bees and...