But the true extent to which the survival circuit is conserved between yeast and humans wasn't fully known until 2017, when Eva Bober's team at the M… - David A. Sinclair

Yes, humans are separated from yeast by a billion years of evolution, but we still have a lot in common. S. cerevisiae shares some 70 percent of our genes.

you were a member of the American upper middle class in the 1970s, you weren't just enjoying a more affluent life, you had a longer one, too. Those in the top half of the economy were living an average of 1.2 more years than those in the bottom half. By the early 2000s, the difference had increased dramatically. Those in the upper half of the income spectrum could expect nearly six additional years of life, and by 2018, the divide had widened, with the richest 10 percent of Americans living thirteen more years of life than the poorest 10 percent.40

In The Structure of Scientific Revolutions, Thomas Kuhn noted that scientific discovery is never complete; it goes through predictable stages of evolution. When a theory succeeds at explaining previously unexplainable observations about the world, it becomes a tool that scientists can use to discover even more.