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

2) The eye of a cyclone is a region of calm, relatively clear skies and light winds at the center of the storm.

3) The world's oldest living plant is believed to be a clonal shrub called "Old Tjikko" in Sweden, estimated to be over 9,500 years old.

4) The game of rugby originated at Rugby School in England and has since evolved into different versions, including Rugby Union and Rugby League.