Black Americans report high levels of vaccine hesitancy

Black Americans have a high level of vaccine hesitancy and mistrust of COVID-19 vaccines, including among Black health care workers, according to a new RAND Corporation survey. Those who expressed vaccine hesitancy also showed high levels of overall mistrust in … Read more

Human impact on solar radiation levels for decades

In the late 1980s and 1990s, researchers at ETH Zurich discovered the first indications that the amount of sunlight reaching the Earth’s surface had been steadily declining since the 1950s. The phenomenon was known as “global dimming”. However, a reversal … Read more