By Richard E Walrath

Liquid CO2 has been discovered on Mars and on the closest thing on earth to Mars – Antarctica.

Where was it first?  Or, where did they discover it first?  I don’t know the answer to either question, but they’re using information from one to find and verify information on the other.

Mars is much colder, but finding Liquid CO2 on both is significant.  

Eventually, we’ll get to the questions of, Who am I and How did I get here?  But in the meantime, air is every where.  Air contains CO2. 

The process for making Liquid CO2 is a combination of reduced temperature of carbon dioxide and pressure.  Reduced temperature is another way of saying how COLD it is on Mars or on Antarctica.  CO2 is heavier than air and sinks down.  AS it sinks to the bottom, sufficient dowward pressure is exerted to form Liquid CO2. 

No, it doesn’t fly–it sinks.  CO2 sinks to the bottom of wells, pools, holes in the ground.

In fact, they call the places that CO2 sinks, "sinks" because CO2 sinks there.

CO2 = Carbon dioxide
H2O =  Water

About water— H2O
For each molecule of oxygen, there are two molecules of hydrogen.  So you know oxygen is heavier than hydrogen.

About carbon-dioxide–CO2
For each molecule of carbon, there are two molecules of oxygen, so you know that carbon is heavier than oxygen.

Therefore, ipso facto, you know that carbon dioxide is heavier than water–that’s why it sinks.