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This is a nice vid but there are two things to note.

1. he does not mention Callisto in place of Europa. Europa gets enough radiation to kill you in a day where on Callisto you would not even get the radiation you get here on Earth.

2. It might be possible to puff up a given asteroid by creating a cylinder within as he points out, but filling it with water and then heating it from outside and once it’s molten the water will expand and blow the asteroid to a larger size. It may be possible to turn a 1 mile wide asteroid into a ten mile wide habitat. I do not know how well it scales up to larger asteroids.


** ADVANCE FOR SUNDAY, JUNE 10 ** FILE ** A bird rests on a deer at the Esteros del Ibera, north of Argentina, in the area owned by U.S. businessman Douglas Tompkins, in this undated file photo. Tompkins now owns well over 1 million acres (400,000 hectares)  in Chile and Argentina, a combined area larger than Belgium he says he wants to save from agribusiness and development. (AP Photo/ Daniel Merle/La Nacion)  ** BUENOS AIRES OUT **

“The donation is part of an ambitious plan to preserve Argentina’s northeastern Iberá wetlands and restore populations of six species of wildlife, including jaguars, that had gone extinct in the region. Tompkins plans to donate about 341,350 acres, a spokeswoman from her nonprofit Tompkins Foundation told The Huffington Post.”

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