1) The development of the microprocessor by Intel in 1971 paved the way for the modern computer and led to the exponential growth of computing power.

2) The first successful human heart transplant was performed by Dr. Christiaan Barnard in 1967.

3) The name "Bluetooth" comes from the 10th-century Danish king, Harald Bluetooth, who united Denmark and Norway.

4) The average person walks the equivalent of three times around the world in a lifetime.