The last great ice age began around years ago. One massive ice sheet, more than 3 kilometres thick in places, grew in fits and starts until it covered almost all of Canada and stretched down as far as Manhattan. Then, 20 years ago, a great thaw began. Over the following 10 years, the average global temperature rose by 3.
Timeline - Wikipedia
Fossils is an identification event which rotates with Rocks and Minerals every two years. Students identify various fossilized animals and plants, provide details about these organisms such as environment, mode of life, etc. This page primarily covers information applicable to the event in general. This is necessary background information that competitors should know in order to understand the event, but most of the event will focus on fossil identification and details about the fossils. There are several ways that fossils can form, ranging from the organism being replaced by minerals to the organism getting trapped in amber.
What Happens When We All Live to 100?
This sitemap link provides access to all the pages on my site. Most searches for subjects covered in Don's Maps can be accomplished by searching on this page for the subject you are after, using your browser's search bar. The premolar, unerupted tooth of a Neanderthal child, Wezmeh 1, has been identified from Wezmeh Cave, Iran. The child is estimated to have been between years old, and the tooth is believed to be from a child taken as prey by a hyena elsewhere, and consumed in the cave. More photos and text of recent discoveries has been added.