Space is also dangerous. More than 20 astronauts have died doing their job.

Space travel is nothing like in the movies. Getting from A to B requires complex calculations

That hasn’t stopped people from signing up and blasting off.

The Moon Landing

Armstrong and Aldrin went back to work collecting samples of moon rocks and dust. After over two hours, the astronauts brought 47 pounds back onto the lunar module and prepared to rejoin Collins. It was time to go home.

MOON WALK

The space station sits just within Earth’s protective magnetic field, so while our astronauts are exposed to ten times higher the radiation than on Earth, it’s still much less than the radiation a mission to Mars will encounter, and of a different type.  Shielding, monitoring, and operational procedures control the radiation risks to acceptable levels to keep you safe.  To learn what happens above low Earth orbit, NASA has extensively used ground research facilities to study how radiation affects biological systems, and more importantly, how to protect them.  They are developing unique ways to monitor and measure how radiation affects you while living in space, and to identify biological countermeasures. Finally, methods to optimize shielding are being studied to help protect us on a journey to Mars. 

Space Radiation. The most dangerous aspect of traveling to Mars is space radiation.  On the space station, astronauts receive over ten times the radiation than what’s naturally occurring on Earth.  Our planet’s magnetic field and atmosphere protect us from harsh cosmic radiation, but without that, you are more exposed to the treacherous radiation.  Above Earth’s protective shielding, radiation exposure may increase your cancer risk.  It can damage your central nervous system, with both acute effects and later consequences, manifesting itself as altered cognitive function, reduced motor function, and behavioral changes.  Space radiation can also cause radiation sickness that results in nausea, vomiting, anorexia, and fatigue.  You could develop degenerative tissue diseases such as cataracts, cardiac, and circulatory diseases.  The food you eat and the medicine you take must be safe and retain their nutrient and pharmaceutical value, even while being bombarded with space radiation.  A vehicle traveling to Mars and a habitat on Mars will need significant protective shielding, which is nonetheless futile against some types of space radiation.

After a few minutes, if the lack of oxygen hasn't killed you, the damage from depressurization will.

Outer space has other hazards - freezing temperatures, lethal radiation. But here's the good news you won't live long enough to have to worry about them. Despite all the dangers, if youre rescued within 60 seconds, you'd probably survive. You wouldnt be in good shape, but youd be alive. And you'll have first hand knowledge of why you never go to outer space, without dressing up in a nice looking space suit.

Captain Edward Smith drove the ship at high speed despite warnings of possible icebergs. Binoculars had not been left in the crow’s nest, where they would have allowed the iceberg to have been spotted earlier. When approaching the iceberg, the first officer ordered propellers into reverse, reducing the ability to steer the ship.

Titanic actually carried more lifeboats than the law required, but the law had not been updated since 1896, while passenger capacity had risen dramatically. The 20 boats could hold less than half the ship’s passengers. During the evacuation, the boats were not filled to capacity.

Sinking the Titanic 'women and children first' myth

It appears to have started when the HMS Birkenhead ran aground off South Africa in 1852, but the notion became widespread after the sinking of the Titanic in 1912. The captain explicitly issued an order for women and children to be saved first. As a result, the survival rate for women was three times higher than for men.