Clues are hard to come by when you’re trying to look back to a time when the continents clumped together like a closed fist. But geologists have found evidence that plants, the most gentle of organisms, may have helped kill most of the life in the oceans 374 million years ago.
Source: juneauempire.com
For at least 2.6 million years, humans and our ancestors have been making stone tools by chipping off flakes of material to produce sharp edges. We think of stone tools as very rudimentary technology, but producing a usable tool without wasting a lot of stone takes skill and knowledge. That’s why archaeologists tend to use the complexity of stone tools as a way to measure the cognitive skills of early humans and the complexity of their cultures and social interactions.
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We were driving on the lake bottom, yet we were more than 12,000 feet above sea level. The spring air was lip-chapping dry. Many of the fishing villages that have relied on Lake Poopó for thousands of years have emptied too, and we drove past clusters of abandoned adobe homes.
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