Three great questions.
How old is the universe? The universe is approximately 13.8 billion years old. That’s as near to absolutely eternity as you’re going to get. 13,800,000,000 years old. Your age will be in either both or one of the last two columns. If its in the the last three send me an email and I will send you a bottle of champagne. A centurion
How old is the earth? 4.543 billion years old. 4.543, 000,000. in numbers.
How long have humans been around? about 200,000 years.
When were mans earliest ancestors around? between 7 to 6 million years ago. 7,000,000 – 6,000,000 Sahelanthropus tchadensis is one of the oldest known species in the human family tree.
Great information on The Smithsonian Institute National Museum of Natural history. http://humanorigins.si.edu/evidence/human-fossils/species