Carl Sagan explains how the ancient Greeks knew the Earth was round and calculated its circumference over 2,000 years ago.

Wow! A new CDC study shows that 7% of dairy workers in Michigan and Colorado tested last summer had antibodies showing recent H5N1 bird flu infection. This is a very high number and means that there are probably many more unknown human cases in states across the US. buff.ly/4hFshYM #Medsky #IDsky

A scientist who successfully treated her own breast cancer by injecting the tumour with lab-grown viruses has sparked discussion about the ethics of self-experimentation. | #AcademicSky | #SciSky | #MedSky |

People with #LongCovid are seeing clinicians in every specialty. If you’re a clinician & feel the need to get up to speed, this is a good resource. #MedTwitter #MedSky www.nejm.org/doi/full/10....

🧵on The Fifth National Climate Assessment. We will start with a look at overall risks & opportunities with #climatechange. 1/

Learn from the past make the future. https:degenerateart.beehiiv.com/p/swept-into-the-flood

Swing Left is saying that Casey can hold onto his Senate seat if provisional ballots are cured by the Nov. 12 deadline and is looking for folks to phonebank and canvas in PA. In-person canvassing sign-up: www.mobilize.us/swingleft/?o... Phone-banking: www.mobilize.us/2024pavictor...

Welcome to blue sky. Please remember to breathe deeply.