The Doppler effect can also be seen in many other phenomena. One common example is the Doppler radar, where a radar beam is fired at a moving target. The time it takes for the radar to bounce off the target and return to the transmitter can provide information about a target’s velocity. Another example is in astronomy, where the Doppler effect is used to determine the direction and rate at which a star, planet, or galaxy is moving compared to the Earth. By measuring the change in the color of electromagnetic waves — called redshift or blueshift — an astronomer can determine the celestial bodies’ radial velocity . Other applications that take advantage of the Doppler effect include sonar, medical imaging and blood flow measurement, satellite communication, and many more.
Thimerosal is a mercury-based preservative that has been used for decades in the United States in multi-dose vials (vials containing more than one dose) of medicines and vaccines. There is no evidence of harm caused by the low doses of thimerosal in vaccines, except for minor reactions like redness and swelling at the injection site. However, in July 1999, the Public Health Service agencies, the American Academy of Pediatrics, and vaccine manufacturers agreed that thimerosal should be reduced or eliminated in vaccines as a precautionary measure.
The author of this article must not know much about research design. All that I can see that this study measured was the difference in social class between two groups. Higher income people might have had better diets and vice versa. In science, you have to try to falsify or disprove your thesis which this study did not do. Moreover, it used proxy measures not real measurements of iodized salt intake. Maybe higher income people ate more fish which has iodine in it? Maybe one community was predominantly Catholic and during that era ate fish on Fridays regularly? Or maybe one community had high levels of perchlorate in the water which can block iodine absorption? The Flynn Effect? Was that Errol Flynn?