Intelligent Design Origin Of Life

Water on Mars? It is more likely clay, many now think

Coppedge: The paper in Geophysical Research Letters by I.B. Smith et al., “A Solid Interpretation of Bright Radar Reflectors Under the Mars South Polar Ice” (GRL, 15 July 2021, DOI: 10.1029/2021GL093618) says that clay is a sufficient material to account for the observations. The water interpretation is problematic, because “the amount of dissolved salt and heat required to maintain liquid water at this location is difficult to reconcile with what we know about Mars.”

Extraterrestrial life Intelligent Design

Worry of the month: Could humans have contaminated Mars with life?

Christopher Mason: There is a chance, however, that if we do detect signs of life on Mars, it could have come from Earth in the first place. Ever since the first two Soviet probes landed on the Martian surface in 1971, followed by the US Viking 1 lander in 1976, there likely have been some fragments of microbial, and maybe human DNA, on the Red Planet.

Extraterrestrial life

Researchers: Organic chemicals essential for life found in Martian meteorite; Rob Sheldon responds

Sheldon: The point is that we don’t expect to find nitrate and ammonia in the soil of Mars, not unless some nitrogen fixing bacteria put it there recently, because over time it will all come out of the soil as N2 gas. Claiming that the process goes the other way, from N2 in atmosphere to nitrates in soils, goes backwards, from high entropy to low entropy.

Extraterrestrial life Intelligent Design

Researchers: Organic chemicals essential for life found in Martian meteorite; Tim Standish responds

Standish: If the nitrogen cycle isn’t established within a certain time, nitrogen will be removed from the atmosphere and the surface will become rich in nitrate (bad) or, in a reducing atmosphere, ammonia (really bad). The bottom line is that there are speculations that probably get around this, but it is one more needle that has to be threaded for chemical evolution to produce the first life, or a problem for the first life to quickly take care of.

Extraterrestrial life Intelligent Design

At Scientific American: We did find life on Mars in the ‘70s. Rob Sheldon weighs in

Levin: When the Viking Molecular Analysis Experiment failed to detect organic matter, the essence of life, however, NASA concluded that the LR had found a substance mimicking life, but not life. Inexplicably, over the 43 years since Viking, none of NASA’s subsequent Mars landers has carried a life detection instrument to follow up on these exciting results.