Deep Space Drones

The Great 415ppm CO2 Event   All planets, as far as we know, have atmospheres. We can see alien atmospheres by looking at the light from their own sun passing through them.   When looking for new life, a target atmosphere must be able to protect life on the surface. Although the sun gives life, without the right kind of atmosphere, the Sun's rays can break apart the chemical bonds of life’s essential organic molecules.   An atmosphere also has to be thick enough not to let water evaporate into space. Water boils at a lower temperature in a thinner atmosphere, thus evaporates quicker.   Our atmosphere is like a blanket around the Earth. There has to be enough to help regulate the transfer of heat to and from space. Otherwise it’s more boiling hot days, ice cold nights, and less beach weather.   Of course what’s in the atmosphere matters too. The air on Earth itself wasn’t always as hospitable as it is today. There was a time when bacteria lived in a world with no oxygen in the air, until one day 2.5 billion ye