Where were the oldest stone tools found that were shown at the beginning of the video? What were they used for and what technology was used to make them?What other types primates are named specifically who also use tools?Even older stone tools have since been found. How old are they, what are they called, and what makes them different?What “feedback loop” is theorized to have been kicked off by the use of early stone tools?What is the significance of the Kanjera South site?What was the new stone tool technology that arrived around 1.7 million years ago? What new types of tools were produced? Why would they be particularly helpful to the species now using them?Where did researchers originally think these tools originated and what new discoveries in 2018 are changing that perspective?What did researchers learn about brain activity when analyzing the brain activity of modern stone tool makers?How is stone tool making related to specialized hands?