1) The speed of a sneeze can reach up to 100 miles per hour (160 kilometers per hour).

2) The ongoing conflict in Syria, which began in 2011, has resulted in a humanitarian crisis, displacement of millions of people, and international efforts to bring about a resolution and provide aid to those affected.

3) The Great Barrier Reef in Australia is the largest coral reef system in the world and is visible from space.

4) 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.