Tracy Chapman, who has not performed in public in years, performs "Fast Car" with Luke Combs at the #Grammys:

Fantastic paper on safe indoor air for kids in school by A/Prof Donna Green @UNSW on impact of air purifiers in #schools with @UNSWEngineering colleagues. Natural ventilation w HEPA filters is most effective way to reliably improve indoor air quality. https://t.co/poDzXFsps1

Long-range transmission of SARS-CoV-2 is the dominant mode: https://t.co/wxZgW38AkU

The Soyuz 3rd stage from today's Glonass navsat launch reentered SE of Tasmania. Here's the reentry warning area (white) and my estimate of the 3rd stage suborbital track (orange). Yes, I know they don't quite match up, I did a rush and approximate job, but it gives you the idea

A thousand pleases: Please watch and share this brilliant simple video from @LongCOVIDPhysio sharing guidance on how to do Long Covid rehabilitation **safely** and trying to undo some of the damage caused by people pushing inappropriate exercise as rehabilitation.

On April 3, you will meet the team of astronauts flying to the Moon on the #Artemis II mission. These explorers will pave the way for future lunar landings and our next giant leap — human exploration of Mars. https://t.co/PRlRVEsJVz

Today Chandra is studying E0102, a supernova remnant produced by the explosion of a massive star in a nearby galaxy. Most of the oxygen in the Universe is synthesized in massive stars. The amount of oxygen in this ring alone is enough for thousands of solar systems.😮

For all those on Earth's Northern Hemisphere, goodbye winter — hello spring!💐 Spring officially begins today at 5:24 pm EDT. Here's a pretty picture of the Tycho supernova remnant. We'll be outside if you need us.😎

I don’t usually post personal news but Clinicians have told us to pull every lever. Our daughter has with #dipg Brain cancer. There is no cure and typically 9m life expectancy. If anyone knows of trials then please get in contact! #braincancer #childrenscancer @CR_UK

Today Chandra is studying Terzan 5, a globular cluster of stars located about 19,000 light-years from Earth. Globular clusters are roughly spherical collections of tens of thousands to millions of stars that are tightly bound by gravity and found in a wide variety of galaxies.✨

Lyrebirds are Australian birds most notable for their superb ability to mimic natural and artificial sounds from their environment (and other environments, if it's the case) [full video by Saeed Lajami: https://t.co/1hjnGVbT8P] https://t.co/LUaeF1aWKh

Today Chandra is pointed into Draco. Nearby in the sky is NGC 6338 — 2 groups of galaxies slamming into each other at about 6.4 million kilometers per hour. One of the most violent collisions of this type ever seen, it's producing temperatures near 20 million degrees Celsius.🔥

Join @theAMRnarrative & @CIDRAP for a Tweetchat about #AntimicrobialResistance & #RareDiseases on #RareDiseaseDay Our panel includes @RACC_UK @aboutface @ellabalasa1 @Ataxia_and_Me @PatientWorthy @DysautonomiaZA @ChiariTracy @joelvsarthritis @rarediseasessa #theAMRnarrative

Returning to free Covid tests in the US 👍. They'll come in handy with upcoming gatherings, especially with the current wave gaining steam. Ordering starts tomorrow https://t.co/t7GnkZ8Qva

Someone asked for a collection of my COVID threads in advance of (US) Thanksgiving in case they want to share some info with family members. Here you go (links to Twitter thread and Threadreader). 🧵

#OTD 15 years ago, history was made in the form of a handshake🤝 On Oct. 25, 2007, two women commanders, Peggy Whitson and Pamela Melroy, shook hands in space. Since then, women’s representation on space crews have increased significantly.

#LongCovid is a microvascular disease. “The first thing to go are your smallest blood vessels… This will not show up on x-ray or CRP test.. your labs will look completely normal”

Convergent evolution UPDATE 10/19. More converging BQ.1.* sublineages and an interesting pipeline (CA.4, BN.4, BN.3.1, BL.1.*) @EricTopol @TRyanGregory @DrEricDing @ewencallaway @CorneliusRoemer @siamosolocani @florian_krammer @kakape @denise_dewald @mildanalyst @RobertoBurioni

Inflammation and dysfunction of the lining of blood vessels—the endothelium—is the basis for many of the cardiovascular complications of Covid. A new, solid review here https://t.co/1GiS8XXzT7