Extraterrestrial life Intelligent Design

At Science: Water bears most likely did not survive a crash land on the moon

Spread the love

Takehome point: There turns out to be at least something that this incredibly hardy species is believed not to have survived. That would be the crash land on the moon of Israeli satellite Beresheet with tardigrades aboard.

According to Wired, there were water bears (tardigrades) aboard:

Someone decided to test whether the water bears (tardigrades) could have survived:

Traspas and her supervisor, Mark Burchell, a planetary scientist at the University of Kent, wanted to find out whether tardigrades could survive such an impact—and they wanted to conduct their experiment ethically. So after feeding about 20 tardigrades moss and mineral water, they put them into hibernation, a so-called “tun” state in which their metabolism decreases to 0.1% of their normal activity, by freezing them for 48 hours.

They then placed two to four at a time in a hollow nylon bullet and fired them at increasing speeds using a two-stage light gas gun, a tool in physics experiments that can achieve muzzle velocities far higher than any conventional gun. When shooting the bullets into a sand target several meters away, the researchers found the creatures could survive impacts up to about 900 meters per second (or about 3000 kilometers per hour), and momentary shock pressures up to a limit of 1.14 gigapascals (GPa), they report this month in Astrobiology. “Above [those speeds], they just mush,”

Traspas says. Jonathan O’Callaghan, “Hardy water bears survive bullet impacts—up to a point” at Science

The water bears were above mush speed, it appears.

What impact does the test have on panspermia, the hypothesis that life might travel between planets via comets?

Traspas, however, says it shows panspermia “is hard,” but not impossible. Meteorite impacts on Earth typically arrive at speeds of more than 11 kilometers per second. On Mars, they collide at least at 8 kilometers per second. These speeds are well above the threshold for tardigrades to survive. However, some parts of a meteorite impacting Earth or Mars would experience lower shock pressures that a tardigrade could live through, Traspas says.

Jonathan O’Callaghan, “Hardy water bears survive bullet impacts—up to a point” at Science

Well, when we meet up with the aliens, they could well be water bears (tardigrades).

2 Replies to “At Science: Water bears most likely did not survive a crash land on the moon

  1. 1
    mahuna says:

    This remains mere silliness. If you want to push a Theory that Life on Earth was “seeded” by life somewhere else, you’re obligated by what passes as MINIMAL traces of Logic to explain where that OTHER place got ITS Life. Although I’m reminded of some bit of nonsense that includes the line “well, it’s turtles right on down”.

    Since God went to a WHOLE lotta trouble over a couple BILLION years to construct the Earth-Moon system just EXACTLY where is best sited, why should we stop short and say, “But God COULD NOT have created Life on the shiny new Earth.”

    I put this in same category as people who want to argue that at “the end of Time” (or something) Souls that were sent to Purgatory instead of Hell will get a Test. And the result of The Test will send that Soul to its FINAL destination in Hell or Heaven. And the number of Angels who can dance on the head of a pin is… (Actually, the answer is 1 because Angels are formed like humans and so occupy the same amount of space)

  2. 2
    mahuna says:

    Every time I try to think about The Beginning of Life on Earth, I see the soft small hands of the Earth Mother planting clover flowers. Nothing fancy, just earthy. And of course there is then the argument over whether the white ones are prettier than the purple ones. But I think She likes them both, equally. And then She breaths a sigh and goes off to plant a Sequoia or something. Busy, busy, busy

Leave a Reply