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After 1969, when Apollo 11 put a man on the moon, many expected a trip to Mars.

The good news about the long wait is that NASA has launched some exciting missions in recent decades.

Space missions were slashed and dreams of visiting the Red Planet dimmed.

That may soon change everything.

According to NASA, there are a number of obstacles that we still need to overcome before sending a human mission to Mars.

For example, the right technology to make such a trip choosing the best kind of fuel, figuring out how the long periods of low gravity will affect humans, timing and many details to work out.

So, humans may land on the Red Planet in the 2030s.

But today, Mars is really the only planet that sits within the habitable orbit around our sun to interplanetary destinations beyond Earth.

According to scientists, humans taking the 40 million mile trip to Mars may age faster than people remaining on Earth.

Experts from the Mayo Clinic in Rochester, Minnesota, are hunting for a way to stop it happening and if it is, they would want to do some work in preparation for a longer mission before anyone launches for Mars.