[Note: Since I couldn’t find an appropriate book whose title starts with the letter Y for this A2Z series, I have chosen an author for this chapter. Harari’s name is more popular than the names of his books anyway.] Today there is only one species of humans left on the earth: homo sapiens. The sapiens are a deadly species, according to Yuval Noah Harari’s acclaimed book, Sapiens: A Brief History of Humankind . It is a book of consequential reflections rather than academic history. It can jolt us out of our complacencies. And we need all those jolts. Humans evolved in East Africa some 2.5 million years ago. That is a rather short period of time compared to the lifespan of the universe: 13.5 billion years. There were many species of human beings up to about 10,000 years ago. But the one species of homo sapiens exterminated all the others slowly over many centuries. We, the homo sapiens, are a terrible breed. We have caused the extinction of thousands and thousands of speci
Cerebrate and Celebrate