
A strange circle on satellite maps turned out to be a 390-million-year-old impact crater
<a href="https://news.google.com/rss/articles/CBMib0FVX3lxTE52UDh6N1cyclNVZDdIS3JDcmgtLU04TU1oV0VlRXZHWlhPeE9hbEpmV2lIWXdNTVFCaV9xXzdPYzB4OXFhN25jSm9rNENOUVYxYm5pM2Z0Sm5kX2lkNVI1UzJrblh6NEh5RmdyWFkwUQ?oc=5" target="_blank">A strange circle on satellite maps turned out to be a 390-million-year-old impact crater</a>&nbsp;&nbsp;<font color="#6f6f6f">Science Daily</font>

