Activity for M Arif Rahman Winandar‭

Type	On...	Excerpt	Status	Date
Question	—	Can agriculture and megafauna coexist? Some say that one of the reason humans developed agriculture is because megafauna (specifically the Pleistocene megafauna) were hunted for food to extinction and humans were forced to develop agriculture to survive, or that the lack of megafauna means no competition for humans to develop agriculture.... (more)	—	over 4 years ago
Question	—	Can a liquid sand ocean exist naturally? I'm talking about this sort of liquid sand: https://www.youtube.com/watch?v=My4RA5I0FKs "Desert-as-sea-analog" is present in many media, but often they lean heavily into fantasy, and it seems not many of them have explained how it works. I'm guessing it's a regular desert with some sort of geyser-li... (more)	—	about 5 years ago
Question	—	Expanding a space habitat Let's say that I start with a Stanford Torus that can house some amount of people. Over time, more and more people start living there, to the point it starts getting crowded. How could I expand the habitat without just building a new one? (more)	—	about 6 years ago
Question	—	Can we stay healthy if we experience microgravity for 8 hours every day? Let's say that at an asteroid mining site, the workers live in a rotating wheel space station that can produce 1g. They use Earth's 24 hour day, and for 8 hours a day, people go to the asteroid to work, which means they experience 8 hours of microgravity. When they're not working, people live in the ... (more)	—	about 6 years ago
Question	—	How to explain the lack of artificial pollination in space colonies? My story is set in the future where space travel is cheap and humanity has colonized Mars and some parts of the asteroid belt. Asteroid colonies can grow their own staple food, but crops that require pollination, like fruits, are imported from Earth and Mars because it's cheaper than growing them on ... (more)	—	about 6 years ago
Question	—	Tracking unique radiation signature? In movies like The Dark Knight, Mission Impossible 4, and Star Trek: Beyond, we see characters attempting to track another person by a unique radiation signature emitted from their body. In the case of the first two examples, the radiation comes from an object that contaminates whoever touches it, so... (more)	—	over 6 years ago
Question	—	Real-world technologies to provide better safety to spaceship passengers Is there any real technology, experimental or conceptual, that can prolong a person's survivability in outer space in case of sudden life support failure? Something that is also easy to wear or implement for day-to-day activity? Something that you keep on your person in the spaceship/station on all t... (more)	—	over 6 years ago
Question	—	Why would astronauts go to space to mine asteroids? Realistically, if we are ever going to mine asteroids, it would be drones and robots that do it, not humans, because of safety and cost reasons. What reason could justify the participation of human astronaut in asteroid mining? (more)	—	over 6 years ago