from earth to mars

[agachak]

first think of standing at earth then light flash there light then think of standing in mars same time how long did light actualy took time to get to mars

not electricty just light

[Phi for All]

Depending on where Mars and the Earth are in their orbits, light from Earth can take anywhere from about 3 minutes to 22 minutes to get to Mars.

[Deidre]

There is a buzzing theory out there, that life actually began on Mars and traveled to Earth, by way of a meteorite. It's not that far (distance wise) and if you read up on it, it's not that far fetched. ''Mounting evidence'' points to the oxidized mineral form of the element molybdenum, thought to be a catalyst that helped organic molecules develop into the first living structures. (on mars)

 

So, when we talk about 'earth to mars'...maybe we should look at in the other way around.

Edited September 2, 2013 by Deidre

[victorqedu]

This hypothesis is very old and purely speculation. Is not actually a theory yet.

The following is a quote from the last link I posted.

Among the many, many things he would have to prove, and this is just for starters:

1). "Oxidized molybdenum could not have existed on Earth in early Earth history." While it's widely accepted that the early Earth had low oxygen levels, it does not follow that oxidized molybdenum could not have existed. There are a couple of ways I can think of without even trying.

2). "Oxidized molybdenum was essential to the formation of life." This is unproven.

3). "Tar is antithetical to life." Well, tar exists now and so does life. Some organisms even consume tar. At any rate it seems overstated and rash to claim that the formation of tarlike compounds would prohibit the formation of life.

4). "Mars was hospitable to the formation of life at that time while Earth was not." Really? How? They were far more alike than dissimilar. My argument is weak but so is Professor Benner's, and he's the one who has to prove his hypothesis.

5). "O2 was essential to the creation of oxidized molybdenum, essential to life." This becomes a paradox. There is widespread agreement that high levels of O2 is indicative of life, not a precondition for it. If that were true, and oxidized molybdenum were essential to life starting, then life could not start to produce the O2 necessary for it's creation.

6). "Transfer of life from Mars to Earth happened at the time observed in the archeological record." This will be a tough one to nail down. It's plausible but that's all.

7). "Reverse seeding of life, from Earth to Mars, did not happen." This may be easier to support. Earth's gravity well is greater than Mars. However ruling it out will be extremely difficult.

8). "The archeological record shows common morphology, and ideally common biology (including genetics) between Earth and Mars." This will have to wait on archeological data from Mars.

I understand that my paraphrases of Professor Benner's position may not correctly reflect his true beliefs. If so, I await correction and will withdraw them as appropriate.

http://www.space.com/22577-earth-life-from-mars-theory.html?cmpid=51463011319564

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2890202/

http://science.slashdot.org/comments.pl?sid=4145815&cid=44712033

Edited September 3, 2013 by victorqedu