Pennsylvania’s Lehigh Valley was once synonymous with America’s industrial might. The region was known for its booming manufacturing economy anchored by companies like Mack Trucks and Bethlehem Steel, the latter of which employed over 30,000 workers at its peak in the 1950s. But manufacturing began to struggle in the 1970s and collapsed by the turn […]
Hervs represent the remnants of infections from ancient viruses. james benjamin/ Shutterstock Around 8% of human DNA is made up of genetic sequences acquired from…