https://www.humantruth.info/tags/space_travel.html
Main page:
Human Truth Foundation pages (2):
Unidentified Flying Objects (UFOs)
Alien Life and Planet Earth: Have UFOs visited us? How would we communicate with an alien planet?: 2. UFOs Are Probably Not Aliens
Not from the Human Truth Foundation, but still relevant (1):
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Making My Teleportation Device Work: 5. Duration and Delay
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