Recent content by Trevize62

Of course. At the present we have discovered many things about extrasolar planets and solar systems that were unknown when the Drake's equation was conceived, that a discussion about this topic has no more sense. I agree with you that we can close it.

I think it's very difficult to defend a concept so obsolete.

Absolutely right. Also, alien species could have senses and percerptions completely different from ours, being able to communicate in ways that we would not detect. In an interview on this topic, the famous SF writer and editor John W. Campbell (that also had a major degree in physics)...

Not of the kind that we can see in Star Wars. Instead, a direct-energy weapon capable of destroying all complex lifeforms on an entire planet is theoretically possible, using an X-ray laser triggered by the explosion of a great number of enormous multi-stage nuclear bombs , and despite we have...

Obviously they Obviously their DNA sequences and enzymatic kits would be different, but we would realize it only in presence of a serious reason to make such biochemical study on a bacteria.

A true Dyson sphere is impossible to build, but we could find an acceptable substitute in a swarm of megastructures with dimensions between 5 and10 km.

At a minimum level of complexity (bacteria or mycoplasmas) we could not be able to discriminate between Earth and alien lifeforms.

This situation is provisory, because the distance Earth- Moon progressively increases because of tidal forces. In a far future there will be no total eclipses but only anular. In the remote past the Moon was nearer to Earth, and the suyb corona was not visible during total eclipses.

Crew Dragon for real, Nostromo for fictional

I think that before starting a discussion like this we would have detected such objects. In absence of evidences they really exist is a waste of time.

I know, and also underlined this in my post on this thread sent in date 12/03.. But my question remains. If Venus has only an induced and weak magnetosphere, why its atmosphere did not escape?

The proofs of Einstein's general relativity theory are concrete, founded on more a century of observations that have confirmed all its predictions, and the same assertion can be made for quantum theory. Moreover, since there is no way to reach experimentally the energy level at the moment in...

"Speculative proof"? A proof must be concrete, not speculative.

The existence of multiverses is not supported in any way. Furthermore, we have so many Earth-similar planets in our galaxy that actually do not need to search life in M31.

The problem is that there is no objective feedback on the existence or non-existence of some form of multiverse. Every claim about this argument is arbitrary., and a discussion on this argument is out of place in a scientific discussion.