Preserved hair reveals how bad lead exposure was in the 20th century

Although humans have found lead useful for thousands of years, the toxic effects of this metal were not well known until the 20th century. Now, researchers use historical hair samples to show that regulations targeting heavy metal pollution are highly effective at reducing public exposure to lead once its dangers are known. “We have hair […]

Aurora heads toward Earth as perhaps the most active sunspot in years

Updated February 3rd at 11:00 AM ET: Monster sunspot region 4366 is currently facing Earth and shows no signs of weakening. It is the most active sunspot in the current solar cycle (period 25). NOAA predicts that a massive CME shot toward Earth is likely to occur this week. A minor (G1) geomagnetic storm is […]