Replies

Thank you for your knowledge on the subject! I was up pretty late reading all kinds of different stuff as this was the first I had heard of the Milankovitch cycles. Being an engineer and understanding that nothing is absolute and has some certain tolerance band, i.e. our orbit around the sun, the Earth’s axis tilt, it got me thinking about how these tolerances, coupled with the sunspot cycle, may have affected climate changes in the past. Your additional information is really valuable.

Its also cool that they are studying the same stuff on Mars. Kinda blows a hole in the MAN-MADE theory when man has never set foot on Mars.

Mars and Venus are examples which hold great interest. Hansen, NASA GISS, is notorious for his use of Venus as an example of Earth’s fate if the purported Climate Change is not immediately halted by stopping usage of fossil fuels. His political stance and bogus science are very bizarre indeed when you look at how the atmospheres of Venus, Earth, and Mars deveeloped.

Venus has a truly massive atmosphere dominated by carbon dioxide. This is especially interesting for a number of reasons, including the similarities between the atmosphere of Venus compared to the Early second atmosphere of the Earth. Both atmospheres featured the crushingly massive carbon dioxide atmosphere, but Earth’s biosphere consumed all but trace levels at parts per million of the carbon dioxide and depostied it into the lithosphere and released parts of the oxygen into the atmosphere. On Venus, we can see empirical evidence that the massive carbon dioxide was not consumed by a biosphere and thereby reduced to levels of 1 percent of its early mass and carbon dioxide composition.

When we look at Mars, we again find a planet with a predominately carbon dioxide atmosphere. Unlike Venus, however, Mars lacked the gravity necessary to retain its earlier and more massive atmosphere. The Solar winds have accelerated much of the Martian atmosphere to escape velocity and stripped it off into inter-planetary space. If Mars had ever developed carbon based lifeforms like Earth or provided a home to lifeforms with an origin on the Earth, it would seem most likely any aerobic lifeforms should have consumed and removed all but trace levels of carbon dioxide from the thinning Martian atmosphere. Instead we see today a thinned Martian atmosphere that is still dominated by the carbon dioxide life would have removed.

Speculation would seem to require a proper explanation for how a planet hosting carbon based lifeforms related to the basic chemistries and physics of liquid water and atmospheric dioxide would or could fail to remove nearly all carbon dioxide from a planetary atmosphere?

To find Earth-like life on exoplanets, it would seem likely that the planet must not have a substantial primordial carbon dioxide atmosphere, because the lifeforms would have consumed and removed it from the atmosphere. The biochemistry of the lifeforms seems to require it.

Hansen is also wrong about Venus, when you consider that the massive concentrations of carbon dioxide still result in comparable air temperatures at the higher levels of the Venusian atmosphere where the atmospheric pressure is comparable to Earth’s surface atmospheric pressure.

If the other planets harbor life, it would seem the life would tend to be anaerobic, poisoned by exposures to oxygen.