Naked Science - Spacemen Catastrophe - Episode 2 - Snowball Earth 2 days ago   50:07

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The Real Star Trek discovers the challenges humankind will have to overcome to journey to distant stars.

One day we may face no choice but to leave Earth, forced by an ice age, pollution or a meteorite to find a new home elsewhere in the galaxy. The difficulties are daunting, humans evolved to live on Earth, not in space. We meet the scientists who are making journeys to Mars and beyond possible.

The first task is finding the right planet; humans need oxygen and water, so not any old planet will do. We meet David Miller, the MIT scientist who works on the Terrestrial Planet Finder project and thinks it will make the job of finding a new home a whole lot easier. The ‘TPF’ is a set of orbiting satellites which are able to spot Earth like planets and reveal whether they have a ‘human-friendly’ atmosphere.

Once we’ve found a target there’s the small matter of getting there. Just travelling to Mars and back is likely to take years. Journeys to stars are likely to be decades if not centuries. We look at some of the concepts to come out of NASA’s propulsion labs, from solar sails to antimatter.

But even the rocket scientists can’t make our ship break the speed of light; we have to accept that crews are going to have to be in this for the long haul. We meet scientists who are trying to ensure that they arrive at their destinations healthy and ready to start life on a new planet.

At MIT we see centrifuges that mimic the effects of gravity, installed in a spaceship they might stop the crippling loss of muscle and bone mass that would threaten our astronauts. Dava Newman demonstrates her revolutionary design for a spacesuit on a climbing wall, made of flexible material it will work with the wearer unlike the bulky suits currently used. We also reveal the work being done to overcome the deadly effects of cosmic radiation that threatens to wreck our crew’s DNA.

We also look at the work being done to keep our crew in sound mind. Sealed in a ship for years with only faint communications with Earth they may rely on the software being designed by David Dinges, which allows a computer to spot when humans are becoming stressed.

Eventually though we may have to accept that more drastic changes are needed before we can leave for the stars. From hibernation pods, to methods to slow down aging, the world of science fiction may have to become fact before we can leave our solar system. And if we embrace genetic manipulation to redesign ourselves for space we may also have to change our ideas of what a human is.
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Comments 346 Comments

dylan storm trooper der
negatively charged protons are neutrons and the other way around?
mix master playr
i smell BS radiation spots where only reported in 2011 by the crew of the last highest altitude record ever made by a shuttle even the news reported the astronauts had to turn back due to radiation passing right through there eyelids and yet this video says this happened to all the apollo missions? ive even seen buzz and neil being asked about the phenomenon to wich they seemed like they didnt have a clue
sentryogmixmaster
human beings...so young and so dumb.
ericdirtbiker
next naked science- SEAMEN
Lossy Lossnitzer
Spacemen - that is a bit sexist. I am sure other sexes have been to space :)
Fuzzy Lumpkin
Yeah with no sex in space stop being kids about it what are the health benefits we are humans
Zoia Baramidze
About gravity?? why we can't get magnet shoos to Woking on the metal floor in the space shep . It's great what we need ..NASA think about this it s good idea
Zoia Baramidze
If we can't sleep people for long time why we don't freeze the people to fly long way???
Monty Wright
. .. . *Most excellent .  ..  .      .         .                 .                        .                             .                                      .*
Bill Tucker
"rising sea might drown us" you watch too much CNN, calm down
Tyler Dochstader
Solar sails Hecks yeah anti matter engines hecks yeah yay
The Mercer
If you want to go to another solar system you need to do it BIG. There is not much point in considering a small ship with small crew. First build a large space station, with spin gravity living section for a few hundred people. Once we have that working, try moving it. Take it for a test flight to Mars and back or maybe go all the way out to Jupiter. This will let you discover lots of unexpected issues and fix them before you take the long leap into deep space. As for speed, there is not much point in trying until you can get to about 10% of light. That makes a 7 Light year trip into a 70 year trip, a long time but not a crazy long time. Of course the ship should have enough room to accommodate the expanding population that will happen along the way. All this assuming a destination that is Earth-like. Well to be safe dont do that. The mission should be prepared to establish a viable colony on any rock that has the basic resources it needs.
Paulo Sousa
We have a lot to overcome if we want to live in space one day. Human body can’t cope with what space throws at us and never will.. we are doomed to perish as a race one day. There’s no way around that
kane lee
solar sails are not the best candidate..    lets build starships in  our orbit. lets use material that we can recycle.
kane lee
no shit, Houston we got big problems..
Earth Man
Send frozen embryos. Have them raised by "computers" and "robots". No need to provide air and food for the trip. Much smaller spaceship needed. Much longer time and distance possible. Just takes forseeable technology. Does not require physics breakthroughs that might not be possible. Humanity can reach the stars. Human individuals can leave earth but can never reach the stars.
Quanchy Plimp
"may", "might", "possibly", "could"......aka, we have no fucking idea what we're talking about, but hey, we have funding, so we'll make a program about it anyway.
Alex Duke
6:13 well, I guess you could say I'm producing thrust right now too then
Angela Thomas
I would love to come out there and see a new life I would go now
Genius by Design
Divorce in space :) Did a Lawyer cuntsalt on this DOC ?
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Catastrophe - Episode 2 - Snowball Earth Naked Science - Spacemen 2 days ago   48:03

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Every other Wednesday we present a new video, so join us to see the truth laid bare...

This spectacular five-part documentary series, presented by Tony Robinson, investigates the history of natural disasters, from the planet's beginnings to the present, putting a new perspective on our existence and suggesting that we are the product of catastrophe.

99% of all the creatures that have ever lived, no longer exist. They were wiped-out in a series of global catastrophes. Each disaster changed the course of evolution on earth. Without them mankind, nor any of the life we see around us, would be here today. For out of catastrophe comes rebirth. Evolution is a savage, imperfect and violent process. It's survive or perish. The earth's history of catastrophes has both moulded the planet and determined evolution. For each disaster led to another leap forward on the evolutionary trail form single celled bacteria to humankind itself.

Episode 2 - Snowball Earth

This programme delves into a world lying beneath a frozen surface. It is the greatest climate disaster ever to have hit Earth. 650 million years ago, a cataclysmic ice age sealed the entire planet beneath ice and snow, almost destroying life and turning the world into one huge snowball.

Snowball Earth uncovers the story behind one of the most controversial theories in science today. To investigate, the programme travels the world to follow scientists scouring southern Australia, Nevada's Death Valley and Alaskan glaciers for tantalising clues as to how our planet ran away into this doomsday scenario. The results could improve understanding of evolution and survival of life.

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