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Katie Mack

@astrokatie.com

260K followers 1.4K following 8.7K posts

Cosmologist, pilot, author, connoisseur of cosmic catastrophes. TEDFellow, CIFAR Azrieli Global Scholar. Domain verified through my personal astrokatie.com website. She/her. Dr. Personal account; not speaking for employer or anyone else.

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Katie Mack @astrokatie.com · Nov 30

This holiday season, why not give the gift of ultimate cosmic destruction?? 💥🌌

www.astrokatie.com/book

Kirkus Reviews calls it “a delightfully unsettling narrative”! @leebillings.bsky.social raves about my “infectious enthusiasm for communicating the finer points of cosmological doom”!

The End of Everything — KATIE MACK, ASTROPHYSICIST

Information about "The End of Everything (Astrophysically Speaking)" by Katie Mack

www.astrokatie.com

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Katie Mack @astrokatie.com · 2h

These guys six months ago: “We must outlaw masks because people might wear them to commit crimes!”

These guys now: [wearing masks to committing crimes]

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Reposted by Katie Mack

Rowan Hooper @rowhoop.bsky.social · 3h

Off to commemorate the End of the Universe this evening with a New Orleans-style second line featuring Steve Pretty and the Hackney Colliery Band and @chrislintott.bsky.social and @astrokatie.com wegottickets.com/event/676292

The End of the Universe

After a magnificent* 13.8 billion years** astronomer Chris Lintott (Sky at Night) and Steve Pretty (Hackney Colliery Band) lead a funeral and wake for the universe, as it sadly heads into heat death. ...

wegottickets.com

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Katie Mack @astrokatie.com · 18h

I shouldn’t get too much credit; I did just cross an ocean on a 777 😕

Katie Mack @astrokatie.com · 18h

It’s enraging how much harm JKR and her ilk have caused

Katie Mack @astrokatie.com · 18h

Mine too!

Katie Mack @astrokatie.com · 18h

Every time he does this a calculator somewhere in the country spontaneously bursts into flames

Aaron Rupar @atrupar.com · 22h

Trump: "We're gonna be reducing the cost of medicines by 100%, 200%, 300%, 500% and even more than that."

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Katie Mack @astrokatie.com · 18h

Today I arrived on the red eye to London Heathrow, took the Tube to my hotel, dropped my bags, hopped on a Lime Bike to cross town, recorded a podcast with New Scientist, then walked an hour (through Hyde Park) back to my hotel. This city is wonderful and I am so tired.

See you tomorrow, London! 😴

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Reposted by Katie Mack

Rowan Hooper @rowhoop.bsky.social · 21h

Podcast out tomorrow - with @pennysarchet.bsky.social and @mjflepage.bsky.social and time zone-shifted Katie!

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Katie Mack @astrokatie.com · 21h

Update: the podcast recording, with @rowhoop.bsky.social and the @newscientist.com team, went very well! Also the parks are lovely and the weather is great 😊

A garden in Kensington Gardens with a little pond and some nice shrubbery

A park walkway with green vine arches covering it. A couple are framed at the end of the path

A park path with orange leaves scattered around

A pond in a decorative garden in Hyde Park, with partly cloudy blue skies above

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Katie Mack @astrokatie.com · 22h

😞

Katie Mack @astrokatie.com · 1d

Neither of those!

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Katie Mack @astrokatie.com · 1d

We landed in the morning, but just barely. Usually I arrive a lot earlier though

Katie Mack @astrokatie.com · 1d

Realized after posting this that it is not, in fact, morning, which might bode slightly ill for my ability to be coherent on mic. We shall see.

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Katie Mack @astrokatie.com · 1d

Thank you! I’ve got my brolly just in case 🌂

Katie Mack @astrokatie.com · 1d

Earl Grey. Hot.

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Katie Mack @astrokatie.com · 1d

Thanks!

I’ll be in Bristol on Wednesday. I’m around a few days then back in London Friday week.

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Katie Mack @astrokatie.com · 1d

Good morning London! 🇬🇧 You are lovely as always.

I have just landed at Heathrow and am now Elizabeth Line-ing into town to immediately record a podcast. Hopefully the caffeine will sufficiently mask all the jet lag and sleep deprivation! 🏃‍♀️

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Reposted by Katie Mack

Prof Gavin Yamey @gavinyamey.bsky.social · 1d

“A study, published on Wednesday in the New England Journal of Medicine, showed that last season’s 2024–2025 mRNA COVID vaccines reduced people’s risk of emergency department visits by 29%, their risk of hospitalizations by 39% & their risk of death by 64%”

Benefits were seen even if 0 risk factors

Soren Larsen (SEGL) @sorenlarsen.bsky.social · 1d

Annual COVID Vaccines Protect People against Severe Disease, Even with Prior Immunity

"The new research also “calls into question the idea that younger individuals and those without risk factors don’t need the vaccine,” Viswanathan says."

Annual COVID Vaccines Save Lives, New Study Shows

A new study shows that receiving an updated COVID vaccine reduced people’s risk of severe disease and death in all age groups, regardless of immunity from prior infection or vaccination

www.scientificamerican.com

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Reposted by Katie Mack

Brent Toderian @brenttoderian.bsky.social · 2d

“When streets became calmer & safer, more people felt comfortable trying a bike commute for the first time. Families began pedaling to the park…Local businesses saw new life…And cycling stopped feeling like a niche activity—it became part of everyday Parisian life.”

Via @momentummag.bsky.social

New Study Shows How Paris Pedaled Its Way to a Cycling Revolution

Cycling through central Paris meant weaving between buses and scooters—a bold choice reserved for the fearless few.

momentummag.com

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Katie Mack @astrokatie.com · 1d

I mean I like it more than I like the fact that people who get most of their money from already having money (investment income) get effectively taxed less than people who get their money from working

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Katie Mack @astrokatie.com · 1d

Unless the subsidy covers the entire cost of caring for children, I don’t think I’d call it a penalty on those who don’t get it. And as someone without kids I personally don’t mind if my taxes are very slightly higher to keep the next generation out of poverty

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Katie Mack @astrokatie.com · 1d

At my nieces’ school in the US, kids who take more than a couple days off for Covid are written up for truancy 🥴

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Katie Mack @astrokatie.com · 1d

“That Samaritan was a sucker”

Katie Mack @astrokatie.com · 1d

😑

Katie Mack @astrokatie.com · 1d

Even aside from being obviously morally correct it’s way more cost effective and leads to a better time for everyone!! Like I get that there are (bad) people who derive life satisfaction from being wealthier than everyone around them but I don’t think anyone wants everyone around them to be sick!

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