1) The world's largest particle accelerator, the Large Hadron Collider, is located near Geneva, Switzerland, and spans a circumference of 17 miles (27 kilometers).

2) 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.

3) The Amazon rainforest produces more than 20% of the world's oxygen.

4) The sunflower is not a single flower but a cluster of small flowers arranged in a spiral pattern.