1) The word "triangle" contains four vowels: I, A, E, and E.

2) The Pacific Ocean is the largest ocean on Earth, covering more than 30% of the planet's surface.

3) 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.

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.