Climate collapse, Fermi paradox 

I wonder if it's possible that an artificial satellite orbiting Venus would have remained invisible to this day. If it has a small enough radar cross-section and stable orbit...

I wish I would know more astronomy.

/cc @anne

This could make an awesome AND terrifying science-fiction story.

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@uint8_t I saw an article about a similar hypothesis, but on Earth, several million years ago during one of the mass extinction, as the period was hotter than today, and was following a rapid increase of CO2 in the atmosphere.

@Feufochmar But how much carbon is still in hydrocarbon and coal form on our planet? What if we burn everything? (if the atmosphere gets depleted, we can liberate oxygen from minerals, it's just a matter of energy)

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