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Enigmatic circles of mammoth bones in eastern Europe date to Ice Age

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Alexander Pryor
As the last Ice Age tightened its hold on Europe, a group of people living near the Don River piled dozens of mammoth bones into a 12.5m (30ft) wide circle. They may have lived in the shelter of the mammoth bones for a while, hu…

How to set up Zoom video for dual monitors and screen sharing with PowerPoint

While Zoom publishes a straightforward document on how to use dual monitors with the Zoom desktop client, in our experience, the process can be more complex. Because some apps may not work the way you want them to on default, you’ll likely need to…