It blows my mind what Democritus (460-370 BCE) knew 2400 years ago.
I would love to have a chat with this fellow to have him explain me how he came up with such answers as listed bellow such a long time ago.
46 There is an infinite number of worlds of different sizes: some are larger than ours, some have no sun or moon, others have suns or moons that are bigger than ours. Some have many suns and moons. Worlds are spaced at differing distances from each other; in some parts of the universe there are more worlds, in other parts fewer. In some areas they are growing, in other parts, decreasing. They are destroyed by collision with one another. There are some worlds with no living creatures, plants, or moisture.
47 The material cause of all things that exist is the coming together of atoms and void. Atoms are too small to be perceived by the senses. They are eternal and have many different shapes, and they can cluster together to create things that are perceivable. Differences in shape, arrangement, and position of atoms produce different things. By aggregation they provide bulky objects that we can perceive with our sight and other senses.
Many people where he lived had inquisitive minds just as he and their scientific knowledge was amazing as well as their teachings on life & morality. Had they been able to continue their teachings one can only imagine how advanced our sciences & evolved our societies would be. Unfortunately close minded religions took over and proceeded to destroy all of this knowledge and kill anyone who dared speak such foul worlds......
You can read more of his writings: