Jia Lanpo, a famous archaeologist in China, once said, "If we compare the history of the earth for four billion years to one day, then the history of mankind for two million years is only equivalent to the last thirty-eight seconds of a day. The recorded history of mankind is only the last 0.08 second if calculated in 4,000 years. How can we judge complex natural phenomena by' my experience' and' common sense'? "

How long have dinosaurs ruled the earth? 1*24*60/46=3 1.3 minutes