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After 11 half-lives (42 days), radon radioactivity is at 1/2 000 of its original level. At this stage, the predominant residual activity is due to the radon decay product 210 Pb, whose half-life (22.3 years) is 2 000 times that of radon, and its descendants 210 Bi and 210 Po, totalling 0.03% of the initial seed activity. [citation needed]
Radon is a major cause of cancer; it is estimated to contribute to ~2% of all cancer related deaths in Europe. [1] Radium, like radon, is radioactive and is found in small quantities in nature and is hazardous to life if radiation exceeds 20-50 mSv/year. Radium is a decay product of uranium and thorium. [2]
The California drought manipulation conspiracy theory is a conspiracy theory that proposes that the 2011–2017 drought was a deliberate, man-made phenomenon, created by weather modification. It is largely promoted by a number of self-proclaimed "independent researchers" and "scientists", and by alternative news outlets .
One day after setting its all-time high temperature record with Tuesday's blistering 116° Fahrenheit reading, Sacramento, Calif., bested another hot weather mark, recording its 42nd day in a ...
Higher gusts were recorded at that site before and after, according to weather service data: 63 mph at 2:20 p.m. and 70 mph at 9:30 p.m. It's unclear what the wind readings were at the tower ...
A Russian man went viral on social media after heroically saving an American flag from a California home. ... the California fires in 2020, but now it was my first time [being near a wildfire ...
A number of spas that treat visitors with naturally infused radon water from the local hills were founded in 1906 and onwards in Jáchymov, Czech Republic, and still exist today. [6] These spas were world-renowned, as evidenced by an article in the New Zealand Thames Star Supplement from 1912 (the article uses the Austrian name of the town ...
David Meade is the pen name of an American author and end-times conspiracy theorist.Meade, who describes himself as a "Christian numerologist", [2] claims to have attended the University of Louisville and studied astronomy, "among other subjects."