Can a star turn into a planet? Can gravity form waves? Does every black hole contain a singularity? Does sound travel faster in space? Does the influence of gravity extend out forever? Galaxies look stationary, so why do scientists say that they rotate? Have aliens ever visited earth?
Answer: Space is truly a fascinating place. I feel like being in space would inspire me to do research on a question related to/about something historical that happened in space.
Maybe a question like, "How did we "quote on quote" lose the technology to get back into space?" I still don't understand how we could lose some tech so important. I would do further research on if that's really true.
the first answer as blood needs to be oxygenated to be passes round the body then when its deoxgenated it will return to the heart to be pumped around the body again
