Avi Loeb

6 days ago | avi-loeb.medium.com | Avi Loeb

Everything we do here on Earth will be deleted from the cosmic record in a billion years, when the Sun will brighten and boil off all liquid water from the surface of our planet through a runaway greenhouse effect. The sturdiest structures we construct on the surface of Earth will constitute the tombstones of our civilization. This state of affairs should remind us of our personal life, where the notion of death affects what we choose to do in the limited time allotted to us.

1 week ago | avi-loeb.medium.com | Avi Loeb

The quality of neural networks depends on their training data set. This applies to both natural and artificial networks. Today’s young generation is eager to protest unreasonably because it does not have a good sense of history, nor a balanced perspective of the risks from bad actors. Similarly, artificial intelligence (AI) systems without the latest advances in reasoning tend to hallucinate.

1 week ago | avi-loeb.medium.com | Avi Loeb

When we look at the dark sky on a night without clouds and far from city lights, we see plenty of stars like the Sun. Knowing that a substantial fraction of these stars host a rocky planet like the Earth at roughly the same separation implies that the Earth-Sun habitat is not unique and that suggests there might be exo-spectators like us who see our Sun from a distance.

1 week ago | avi-loeb.medium.com | Avi Loeb

Most of our adult life, we invent stories or believe in stories told by others, rather than seek supporting evidence for these stories. The reason is simple. Evidence-based reasoning is hard and story-telling is easy. But in the words of John F.

2 weeks ago | avi-loeb.medium.com | Avi Loeb

My 20-minute presentation at the UAP congressional briefing on May 1, 2025 (of which the full video, including presentations by other panelists, is accessible here) started with following statements. Let us be honest: there are objects in the sky that we do not understand. When we do not understand what 85% of the matter in the universe is, we invest billions of dollars to find out the nature of that dark matter.