Real Science Radio co-host Bob Enyart interviews the fourth man to walk on the moon, astronaut Alan Bean. After a great discussion, Captain Bean suddenly had to leave, and then Bob then took time to discuss the one topic that they disagreed about during the interview. * No UFOs, No Aliens: Because Astronaut Bean told us on today's interview (as he has said elsewhere too) that he believes that aliens exist, we've decided to update our list of arguments against the evidence for their existence right here on this page (rsr.org/astronaut-on-rsr). Gary Bates's best-selling DVD Alien Abductions and UFOs – Exposed, which has ranked as high as an Amazon.com Top 50 Best-seller, provided the basis for this list though in our typical RSR style we've expanded this, and may continue to build on in, including below numbers 13 through 15! 1. No two UFOs are ever alike: Or more accurately, Earth would have been visited by thousands of different alien species if the wildly divergent descriptions of their spacecraft tended to be valid, yet in unanimity after all these diverse species traverse enormous distances to get here, they all decide to be coy, avoid crowds, make crop circles, etc. 2. They're already here? We've never seen them entering our atmosphere (they're always already here when they're seen). 3. They change shape: They morph. How can nuts and bolds spacecraft do that? 4. They're not physical: Aliens walk through walls. 5. Astronomical discovery makes the ET idea quaint: The UFO idea predates our better understanding: Aliens arriving was thought up in the 50s & 60s and since then we've learned how enormous the Universe is, and just to get across our Galaxy, even at the speed of light, it would take 100,000 years, so the nuclear physicist aliens would have to teach their children to be physicists, and that next generation of aliens would have to teach their children, and so on, and so on, and... 6. Spacecraft travel problems: Energy requirements: 98 atom bombs for 500 grams to get to half the speed of light. Also, - At half the speed of light it would take four million years to reach Andormeda, the closest Galaxy. - 100k dust particles for every cubic kilometer whereas one spec of dust, at a 10th the speed of light, is like 10 tons of TNT exploding on your craft. - A .2 mm paint flake hit the Space Shuttle Challenger in 1983 and it cost $50,000 to repair the damage to the windshield. 7. 9Gs: The force of gravity at Earth's surface, times just nine, could kill an airforce pilot. "Warp speed" would be millions of Gs. Make it so. 8. Cosmic Radiation: Cosmic radiation could kill you. Einstein's relativity indicates that it would require a virtually infinite amount of energy to get your ship to the speed of light. That's why science fiction writers put their faith (and too many boring plot lines) into wormholes. 9. IDH: "UFOlogists", not unlike "witchologists", are big on IDH which is the Interdimensional Hypothesis claim that aliens don't have bodies so they don't need spacecraft. 10. String Theory: Some UFOlogists claim that String Theory's multiple dimensions perhaps they refer to spiritual dimensions but God is spirit and He made spirit beings (angels) and endowed humans with a spirit, and all these persons dwell in only one spiritual dimension. And after many decades, string theory has never found the observational evidence that its supporters have expected. 11. Violate the laws of physics: UFOs materialize and dematerialize and defy the laws of physics as they accelerate toward the ground and do a U-turn. 12. Mythmaking: Markers of the Classic Abduction Syndrome (CAS) include there is a capture and there may be an examination, telepathy, a tour of the ship, and they may take a journey, then return and experience aftermath symptoms of interference. 13. Water is the enemy of abiogenesis: Water on another planet would further prevent, and not enable, the origin of life. Water is not a friend but an enemy of abiogenesis because as the