Lists
The order of things
Universe is 14 billion years old (4.3×10^17 seconds) Sun is 4.57 billion years old Earth is 4.54 billion years old Life is 3.8 billion years old Mammals are 225 million years old …
Unsolicited, avuncular advice
Universe is 14 billion years old (4.3×10^17 seconds) Sun is 4.57 billion years old Earth is 4.54 billion years old Life is 3.8 billion years old Mammals are 225 million years old …