But many countries in the West graduate students into the unemployment line by teaching skills that were necessary to live in 1950. Leaders in China and India realize that science and technology lead to success and wealth. If we prepare now, we better our odds of survival. Of all the possible threats, only a gigantic asteroid hit can destroy the entire planet. Sooner or later, we will face a catastrophic threat from space. No matter how beautiful the theory, one irritating fact can dismiss the entire formulism, so it has to be proven.

Global warming is controversial, of course, but the controversy is mainly over whether human activity is driving it. So when we look at the night sky, it makes sense that someone is looking back at us. One in 200 stars has habitable Earth-like planets surrounding it – in the galaxy, half a billion stars have Earth-like planets going around them – that’s huge, half a billion. In string theory, all particles are vibrations on a tiny rubber band physics is the harmonies on the string chemistry is the melodies we play on vibrating strings the universe is a symphony of strings, and the ‘Mind of God’ is cosmic music resonating in 11-dimensional hyperspace. So I suggest we put a chip in their brain to shut them off if they have murderous thoughts. No one knows when a robot will approach human intelligence, but I suspect it will be late in the 21st century.

Sitting on your shoulders is the most complicated object in the known universe. The human brain has 100 billion neurons, each neuron connected to 10 thousand other neurons.

Kaku time travel