Why hasn't anyone been on mars?

Answer 1

There are several reasons why there has been no manned spaceflights to Mars:

1. Space missions are costly and sufficient funding simply hasn't been available to plan such a trip.
2. It takes a long time to get to Mars - anywhere from 150 to 300 or so days.
3. The technology required to support such as mission has yet to be developed.

As well, there are the challenges facing those astronauts who are travelling to Mars, including:

1. The psychological effects of isolation
2. Lack of access to immediate medical care
3. The negative effects of zero-gravity on human bodies, which can result in muscle loss, loss in cardiovascular fitness, and bone loss.
4. Exposure to cosmic rays and other ionizing radiation
5. The issue of having an adequate food supply that provides all the nutrients required for human health.

Answer 2

Sending humans to Mars is a complex and costly endeavor that requires extensive planning, advanced technology, and international cooperation. Challenges such as long-duration space travel, radiation exposure, and life support systems must be overcome to ensure the safety and success of a manned mission to Mars. Additionally, funding and political will are crucial factors in determining when humans will be able to set foot on the Red Planet.