Mr Brown noted that he could only confirm membership in the group, and could not reveal if other presidents or cabinet members have attempted to join the club.“But it’s important to note that our admissions test is not the sole way to qualify for Mensa — there are hundreds of other prior-evidence tests that can qualify a member,” Mr Brown said.
Stone Age artifacts include tools used by humans and by their predecessor species in the genus Homo, as well as the earlier partly contemporaneous genera Australopithecus and Paranthropus.
Starting from about 3 mya a single biome established itself from South Africa through the rift, North Africa, and across Asia to modern China, which has been called "transcontinental 'savannahstan'" recently.
Starting in the grasslands of the rift, Homo erectus, the predecessor of modern humans, found an ecological niche as a tool-maker and developed a dependence on it, becoming a "tool equipped savanna dweller." In 2010, fossilised animal bones bearing marks from stone tools were found in the Lower Awash Valley in Ethiopia.
“And, the early success of many presidents no doubt exposed them to those types of qualifying avenues.” For instance, he said, several previous presidents would have encountered standardised tests in their early life that could have yielded results that qualify them for Mensa.
For instance, Bill Clinton was a Rhodes Scholar, Jimmy Carter was a nuclear engineer, and George HW Bush was a military pilot.