NASA once envisioned life after Earth in these funky floating colonies

When humans finally outstay their time on Earth, we're going to need a plan B.

In the 1970s, physicists from Princeton University, the NASA Ames Research Center, and Stanford University imagined what this future home might look like. 

They created these artistic renderings of massive orbiting spaceships for life after Earth in the unfortunate case that our planet is destroyed.

As you will see, the designs unearthed by The Public Domain Review are pretty strange.

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In the '70s, the scientists expected that people could travel to the first space colony by 2060. They designed three different types that would orbit the sun.

The first design is this donut-shaped spaceship that houses about 10,000 people.

The colony is full of homes, shrubbery, and sidewalks. A river flows through the center of the entire ship, which is only a half-mile wide.

See the rest of the story at Business Insider

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