Re: Fungal strains in space spark worry - we might have already contaminated --

On 5/8/26 09:31, Kualinar wrote:
> Le 2026-05-08 à 10:58, Jim Wilkins a écrit :
>> "Jim Wilkins"  wrote in message news:[email protected]...
>>
>>> This is significant because it also affects how returned samples must 
>>> be treated and handled.
>>
>> In brief, we can't sterilize a sample that cost billions until we 
>> learn that we must.
>>
>> Have we already been infected and developed immunity?
>> https://www.space.com/mars-meteorites-on-earth-mystery
>> "Meteorites from a variety of sources have been discovered across 
>> Earth's surface for thousands of years, but Mars wasn't suggested as a 
>> possible source of this bombardment until the 1970s when measurements 
>> of the Martian atmosphere made by NASA's Viking orbiters were found to 
>> match gases locked in these space rocks."
>>
> And, we can assume that rocks from the Earth made their way to Mars, as 
> well as Jovian moons.

I had some doubts because of our now thick atmosphere,
BUT, I'm reading   --
(What can go  11,200 m/s (or about 25,000 mph) without
burning up?)
to break free from Earth's gravity and reach the moon,

AI
Yes, rocks from Earth have almost certainly traveled to Mars, just as 
Martian rocks frequently travel to Earth. Massive asteroid impacts on 
Earth over the last 3.5 billion years have likely launched thousands of 
pieces of debris into space, with some inevitably landing on Mars.Impact 
Transfers: Violent impacts on Earth, such as the one that wiped out the 
dinosaurs, have enough energy to send rocks into interplanetary space, 
with some making their way to Mars and the moons of Jupiter.
Likely Habitable Conditions: Many of these rocks, known as meteorites, 
could have potentially carried microbial life between planets, a concept 
known as [lithopanspermia].Mars to Earth: While we haven't confirmed an 
Earth rock on Mars yet, we have over [275 confirmed Martian meteorites 
on Earth].Scientific Consensus: Experts find that, throughout solar 
system history, "rock capable of carrying life has likely transferred 
from both Earth and Mars to all of the terrestrial planets".

Astronomy Stack Exchange
https://astronomy.stackexchange.com
Are there Earth rocks on Mars? - Astronomy Stack Exchange
May 29, 2020 — Said the paper's lead author Rachel Worth: “We find that 
rock capable of carrying life has likely transferred from both Earth and ...
Reddit·r/asksciencehttps://www.reddit.com
Martian meteorites are found on Earth, is the converse also true?
Jan 4, 2013 — Comments Section. rocketsocks. • 14y ago • Edited 14y ago. 
Almost certainly. However,

Reddit·r/asksciencehttps://www.reddit.com
Are there cases of rocks from Earth finding their way to Mars? - 
RedditJul 20, 2021 — Would it be easier to go after near Earth asteroids 
and hope they were originally from Earth? ... Would anything from Earth 
even s...Show all