daniel holz

Black holes, gravitational waves, astrophysics, and cosmology. Doomsday Clock. Existential risk.

[James Evans @profjamesevans]

Featured article out today in the New Yorker about a class on existential risks taught at UChicago by the inimitable Daniel Holz (@decohere) and myself this spring: https://t.co/fREGqhbPfI

[daniel holz @decohere]

The @BulletinAtomic Doomsday Clock is at 90 seconds to midnight. In this podcast we discuss why.

[The DSR Network @thedsrnetwork]

The Doomsday Clock remains at 90 seconds to midnight. @decohere and former executive director Kennette Benedict join @JBWolfsthal and @heatherwilly to share what actually goes into the decision to set the time, and how panicked should we really be.
https://t.co/jRkjdkEo6U

[daniel holz @decohere]

An article about the Are We Doomed? class I taught with James Allen Evans. The material seems to be ever more relevant. We’ll be teaching it again Winter quarter, and hope to place all of the material online and freely available. https://t.co/zaDtap1JRV

[daniel holz @decohere]

Excellent article by @majohnso . Perhaps the first time that scientists worried that their advances could doom humanity. But certainly not the last time. https://t.co/spabp8Fv8y

[Mark Johnson @majohnso]

Did physicists worry there was even a tiny possibility that detonating the first atomic bomb at the Trinity test site in New Mexico might destroy Earth? This comes up in the movie "Oppenheimer." I have a story on the actual history in today's Post. https://t.co/FHt60ORxfS

[daniel holz @decohere]

The 4th observing run of our gravitational-wave detectors officially starts today!! Stay tuned for lots and lots of black holes. And neutron stars too! @LIGO

[LIGO @LIGO]

Welcome to the fourth observing run! #O4IsHere

O4 will last 20 months, with @ego_virgo and @KAGRA_PR joining us in the run. We expect the detection rate will be roughly twice in our past observing run

More news linked from https://t.co/kHnyuP8I2I #ObservingRun4

[daniel holz @decohere]

Please join us to watch and discuss the movie Fail Safe at the Siskel Center. As the announcement says, “We recognize this is a bummer. Complimentary popcorn will be provided with every ticket purchase—and drink specials will be offered!” https://t.co/RrgQabEfdH @BulletinAtomic

[daniel holz @decohere]

Short, powerful video introducing the Pathogens Project conference in Geneva.

[Dr Filippa Lentzos @FilippaLentzos]

How #biorisks are moving the Doomsday Clock — the video that opened our #PathogensProject conference today!
https://t.co/7krFeP9kj7

[daniel holz @decohere]

@FloorAstro Congratulations!!!

[LIGO @LIGO]

The #GravitationalWave detector network is expanding! #LIGOIndia

https://t.co/iSlmbbTfKt

[daniel holz @decohere]

@ErinAstro @alexanderpji @UChicagoAstro @UChicago Thanks for your fantastic colloquium!! You're welcome back anytime.

[daniel holz @decohere]

A new paper on gravitational lensing of gravitational-wave sources, led by Mesut Caliskan (started while he was a UChicago undergraduate) with @jmezquiagabravo and Otto Hannuksela. It's surprisingly difficult to distinguish lensing and (bad) luck! https://t.co/O0KdBkzQlr

[Leo C. Stein is @duetosymmetry on bsky/threads/🐘 @duetosymmetry]

Achievement unlocked: Finding a typo in one of Bob Wald's equations

[daniel holz @decohere]

The latest issue of the #LIGOMagazine is out! This one includes lots of @LIGO @ego_virgo @KAGRA_PR excitement for O4 (we plan to turn back on in May!). It also includes an article on the collaboration's carbon footprint.

[LIGO Magazine @LIGOMagazine]

Issue 22 of the #LIGOMagazine is now live! In this issue we hear about the preparations & hopes of our analysis & commissioning teams as we look forward to Observing Run 4 & consider our role in global climate change. @LIGO @ego_virgo @KAGRA_PR

Read free https://t.co/uLyAwCE21F

[daniel holz @decohere]

Mike Warren was an amazing friend and collaborator. He was one of a kind. Helped invent beowulf clusters (with numerous Gordon Bell prizes to prove it). Also expert at mountain rescue, bicycle racing, guitar, poker, pool, etc. So many happy memories. https://t.co/txywCFbHEQ

[daniel holz @decohere]

Fun, fresh paper led by Reed Essick, asking whether GW sources are random on the sky. Although data is consistent with isotropy, we find an excess in the direction of constellation Equuleus. @GWastrology Note: title is pun intended. https://t.co/M1HHPO6XpL @farrwill @mayaKfish

[daniel holz @decohere]

Congratulations to Yiqi Xie on publication of "Breaking bad degeneracies with Love relations". We explore using the neutron star equation-of-state to improve gravitational-wave cosmology. And who can resist a New Mexico-inflected pun? https://t.co/gOTCxtwiqh

[François Diaz-Maurin - @francoisdm.bsky.social @francoisdm]

BREAKING: In his annual remarks, UN Secretary-General @AntonioGuterres said “the Doomsday Clock is a global alarm clock.”

https://t.co/EQ39eMJi9S

(1/n)

#DoomsdayClock #UNGeneralAssembly #UNSG @BulletinAtomic @UN @UN_Disarmament

[daniel holz @decohere]

UN Secretary-General @AntonioGuterres tells us “the Doomsday Clock is a global alarm clock.” and “We need to wake up—and get to work.” We couldn’t have said it better. @francoisdm @BulletinAtomic https://t.co/Lj7e3xHYvZ

[Bulletin of the Atomic Scientists @BulletinAtomic]

The #DoomsdayClock is now at #90SecondsToMidnight.

Existential threats, like the possibility of nuclear war, put us all at risk.

How do you want to see the world #TurnBackTheClock?

[daniel holz @decohere]

“If there was ever a time for world leaders to take actions to turn back the Clock, it’s now. Until then, it is 90 seconds to midnight.” Op-ed with @JerryBrownGov and @SharonSquassoni on @CNN. @BulletinAtomic @UChicago #DoomsdayClock https://t.co/1a7sS9Qxe5