What was a historical period that impacted Africa the most?

What is the hottest recorded temperature on earth

The process by which liquid water changes into water vapour is called what ?

If you were a casual recreational hiker with young children, which of the following trails would be least strenuous for a leisurely family outing? a. merced lake trail b. mirror lake loop trail. c. tenaya lake and tuolumne meadows trail d. el capitan trail