Depends somewhat on the particular negative. We can claim with certainty that dinosaurs are not alive today, even though there are theoretically places that are not sufficiently explored where, in principle, a dinosaur might live. We are well aware that the fossil record is globally consistent and demonstrates the timing of their extinction, as well as the lack of any fossils of dinosaurs since then.

Similarly, I can claim with confidence that a force does not exist in the universe that would allow me to teleport from place to place instantaneously, because such a force would violate many of the known laws of physics.

There are various types of god-beings that cannot exist because of a logical contradiction. An omnipresent entity, for instance, would be always detectable if it had any measurable effect on the world, but no such measurable effect can be observed. If it is not capable of a measurable effect, then it is indistinguishable from not existing.

Other types of negatives are not easily proven. That is why scientists will say things like, “Based on 3478 measurements, there is currently no evidence to support the existence of higher values than those reported here.”

The Russians have simply continued the count of the Soviet Luna missions.

I love Tartu, but last I heard, the pay and funding sucked. How is it now?

Media during the election:

Kamala said “from” instead of “to” – does she have what it takes to lead the country?

Next up, how ripping apart trade agreements while pretending to be a truck driver is the what America needs.

I did not make a hypervelocity impact crater. I did, however, make a large number of low velocity impact craters.

Rode 190 kms on a unicycle one day.

Same.

China has a very large capita.

It is pretty standard practice. For one, it helps people who read or review your work know who they are dealing with. For another, it helps the general public understand who scientists are. Part of the mission is to make sure that the next generation carries the work on, and by emphasizing the human aspect of the science, young people can actually imagine themselves getting to that point some day.

Yes

How did you diagnose that?

Either 65°C or 70°C

I didn’t take the photo immediately - tried cleaning a bit before it occurred to me to document it.

Interesting. All of my prints that failed were running overnight when the temperature dropped.

Thanks. I am really frustrated with myself for letting this happen. Pulled everything apart and recovered most of everything, but managed to damage the clip that holds the extruder in place, so now I get to learn how to do surgery and replace the entire assembly. I wish I had gotten a bit more time before having to do a major repair…

I’ve been printing for two weeks, and I had one.

My doctoral school in planetary science had students from a mix of academic backgrounds, so we all had to take astronomy as geology classes. We all went together across town to the observatory to meet the somewhat elderly astronomy professor. When he opened his computer, the screen was filled with hardcore porn. We all sat in silence as he closed it and opened his presentation. He then started his talk, which featured a classical painting of the milky way coming from the breast of Hera. When the picture was on the screen he looked at it for a while, then said “mmm, I like this picture.”

No, not today, but give it a couple of years.

I have spent the last 12 years trying to convince my wife that I am not trying to trick her. I really do think she is that beautiful.

Imprint fossils preserve feathers and other soft tissues. No ears.