Michael Busch

A vertical versus a grazing impact for the K-Pg would have had somewhat different effects in terms of the initial shape of the crater, the tsunami, and the distribution of ejecta.

But those are secondary to the size and energy of the impactor.

It was far too large for atmospheric drag to matter.

I am not aware of anyone doing the precision geochemistry that would be required to tell if the spherules concerned are actually made of Yucatan carbonate that was melted & thrown rather than being made of something else (e.g. volcanic glass, forest fire burn products).

I am not convinced by the claims of the season the K-Pg happened.

They are based on spherules at the Tanis site and assuming that particular seiche happened because of the impact.

But other things can make spherules. And the shaking from the impact was before the ejecta from it settled out.

☄️ 16 avril : occultation de l’astéroïde Didymos (impacté par DART).
Le phénomène durera 0,35 s et sera le dernier observable depuis l’Europe avant l’arrivée de Hera.
Le LIRA lance une campagne et recherche des observateurs le long de la ligne d’occultation ! 🔭

I do not know how that decision was made.

Science and Vaccines yes, war and king no

Save NCAR

There is no future without science

Evidence Based Outrage

SF Stand Up For Science, a few of the signs.

My answer would depend on how hungry or in a hurry I was.

Brussels sprouts are a special case.

They actually do taste much better than they used to, since farmers started to grow far-less-bitter varieties starting in the 1990s.

Which has led to me needing to explain jokes about them tasting bad in old books to my daughter.

Attempted suicides, fights, pain: 911 calls reveal misery at ICE’s largest detention facility The calls to 911 poured in from staff at Camp East Montana, the nation's largest U.S. Immigration and Customs Enforcement detention facility, in its first months of operation in El Paso, Texas.

#CloseTheCamps and #AbolishICE

apnews.com/article/suic...

Satellite images from NASA Worldview on March 5 reveal the extent of the blackout in Cuba. A failure at the most important power plant, combined with the US blockade on fuel shipments in the country has left nearly 70% of the island's inhabitants without power.

Now I am wondering how many Republican members of Congress will need MRIs sometime soon.

If they cannot be made to care about anything other than immediate personal consequences.

bsky.app/profile/cenm...

Yet again, USA:

Require that Congress do its job, end all of this, #ImpeachHegseth, and #ImpeachTrump.

Give them no choice otherwise.

Have you ever wondered what Saturn looks like from above? On October 10, 2013 Cassini had the chance to fly over Saturn and take in this stunning view of the planet nestled within its rings, highlighting its mysterious hexagon and colorful cloud layers. This composite is made of images that were taken by the Cassini spacecraft's camera system, the Imaging Science Subsystem (ISS) on October 10, 2013 and received on Earth October 11, 2013. The camera was pointing toward Saturn at approximately 900,000 miles (1,450,000 kilometers) away, and the images were taken using red, green, and blue filters. Credit: NASA / JPL / SSI / Val Klavans about.me/valerieklavans

Flying over Saturn - From Val Klavans (valklavans.bsky.social) - https://flic.kr/p/Ng1pvm

Well done, #California.

Tagging @flintdibble.bsky.social for knowledge of ancient food habits.

I do not appreciate this group trying to invoke the impact hazard for their outrageous nonsense.

I continue to think that Tom Morello's responses to people missing the point of RATM's music are remarkably restrained.

@bretdevereaux.bsky.social has had some writing along those lines.

#UnpackTheCourts

Direct detection of an asteroid’s heliocentric deflection: The Didymos system after DART NASA’s DART mission changed the orbit of the Didymos system, revealing insights into the physical traits of its two asteroids.

Makadia et al. 2026, "Direct detection of an asteroid’s heliocentric deflection: The Didymos system after DART"

www.science.org/doi/10.1126/...

Didymos and Dimorphos cannot hit the Earth.

And they have both have been pushed very slightly further away from Earth's orbit.

No creating an impact hazard while demonstrating how to address the impact hazard.

NASA’s DART spacecraft changed an asteroid’s orbit around the sun A 2022 NASA mission changed the orbit of the asteroid Dimorphos around its companion. New data shows their joint orbit around the sun also changed.

A spacecraft slowed the orbit of a pair of asteroids around the sun by more than 10 micrometers per second — the first time human activity has altered the orbit of a celestial object, researchers report.
https://www.sciencenews.org/article/spacecraft-changed-asteroid-orbit-nasa

Bluesky's quality assurance is apparently severely lacking.

And the things that people are using the text and image generators for are not things that they can actually do.

So they end up doing all the work anyway; just with extra steps.

The next AI winter really cannot come soon enough.

I thank the PA who stitched up my hand when I sliced it open with a can opener.

But they do not have the same skill set as the ER doctor who triaged me or as the hand surgeon I would have been sent to if things were worse.

Assumes facts not in evidence.

I have been asked what 3I/ATLAS would taste like.

"Almonds and wood alcohol" seemed sufficiently discouraging.

bsky.app/profile/then...

Again: Do not try to drink comet water.

CH$_3$OH and HCN in Interstellar Comet 3I/ATLAS Mapped with the ALMA Atacama Compact Array: Distinct Outgassing Behaviors and a Remarkably High CH$_3$OH/HCN Production Rate Ratio We report the detection of methanol (CH$_3$OH) toward interstellar comet 3I/ATLAS using the Atacama Compact Array of the Atacama Large Millimeter/Submillimeter Array (ALMA) on UT 2025 August 28, Septe...

This news release from NRAO today refers to Nathan Roth et al. using ALMA to observe 3I/ATLAS.

Finding vaporizing methanol at but not above the limit of the solar system range: arxiv.org/abs/2511.20845

public.nrao.edu/news/alma-de...