Let’s admit, Mars has been the most popular choice for a second home for humans, and we have been desperately spending billions to get there. But, NASA has finally broken the ice and claims that they can set human foot on Mars within 25 year, once all medical and technical hurdles are cleared off.

The Red planet dream might fantasize us, but the fact is that living or even just visiting Mars is not just about unavailability of oxygen and water – it is much more complex and that is what makes Mars, a challenge. The continuous exposure to deadly radiations on mars released from cosmos is so deadly that it can cause blindness, atrophy the bones and just kill the lander within just a matter of time after landing. All these makes Mars, a very hostile planet – at least for humans. So what space agencies around the world, including NASA are trying to do is find was to solve these major hurdles.

But, there’s hope. On Tuesday, a team of experts and top NASA officials said that the US space agency has the potential to send humans on the Red Planet within 25 years, but the medical and technological hurdles are huge and must be solved. And that’s not it. Even reaching Mars is a big challenge, as it is 225 million kilometres away and that creates a gazillion more scientific problems that we faced in the Apollo moon mission. With current technology, reaching Mars will take 9 months of space travel in zero gravity – and prolonged weightlessness can damage blood vessels in the retina irreversibly, it can leach calcium and bone mass – after all, we are designed for Earth.

The solution to this is cutting down the space travel time massively and that can only be done by much stronger propulsion of rockets. Also, making spaceships capable of being able to survive the harsh entry into Mars, land softly enough, lift off from there and get back to Earth is a challenge on its own. All in all, the number of challenges to put humans on Mars are immense and NASA thinks they can solve them all within 25 years, and by spending billions over billions.