Astrobiologists Obsessed with Life on Mars
People have wondered about life out there, thataway, for a mighty long time. Planetology was unknown, and planets were called "wandering stars" because they moved differently. Some even reversed themselves according to a perspective on Earth. The ancients often used them to represent their false gods.
Later, it was learned that planets were not stars. Was there life on them? Mars was one of the candidates, subject of study, fiction, and erroneous science such as "canals". Today, scientists are downright obsessed with it.
Gale Crater on Mars image credit: NASA / JPL-Caltech / University of Arizona (Slightly modified with Clker clipart, usage does not imply endorsement of site contents) |
As you read the following news items about Mars, keep in mind these facts:(1) No life has ever been found on Mars.(2) No organic molecules indicative of life have been found on Mars.(3) Mars has no global magnetic field to protect life.(4) Mars has no ozone layer to protect it from UV radiation.(5) The surface of Mars appears to be dry and crackling with static electricity (2 Aug 2006).(6) Much of Mars is covered with perchlorates and salts that are toxic to life (26 July 2018).(7) The Martian atmosphere is 1% as dense as that of earth, and lacks oxygen (well, only 0.13%).(8) All hopes for finding life since the famous “canals” bamboozle have turned up empty.(9) The temperatures on Mars are below the freezing point of water most of the time.Most importantly, life is far, far, far too complex to ever arise by itself (see our Origin of Life topic). Can writers resist the urge to speculate about life on Mars? Let’s find out:
Maybe it’s just the noisy ones who talk to the press, but planetary scientists appear to have an astrobiology addiction. They seem bent on finding life on every round thing in space. Why is this? They should know you cannot build a case on a sample size of one.Planetary scientists tried that with exoplanetary orbits (i.e., predicting rocky planets near to the star, gas giants farther out) but were embarrassed when real exoplanets violated those expectations. Hot Jupiters were common, and other exoplanet systems seemed to follow no pattern. Now they do this with life. Earth has abundant life, but it does not follow that other bodies have it (see non-sequitur in the Baloney Detector). That’s a mythoid, not a factoid. They also promote myths of molecules emerging into life on any body that might be habitable. Most scientists reject miracles, but find that one very handy—indeed, essential.The press never calls them on these myths. Watch the art of myth-direction in recent planetary science news.