The protein, reverse transcriptase, has become an essential tool for making DNA copies of RNA.

A little more than a year ago, on a trip to Nairobi, Kenya, some colleagues and I met a 12-year-old Masai boy named Richard Turere, who told us a fascinating story. His family raises livestock on the ...

Stocks: Real-time U.S. stock quotes reflect trades reported through Nasdaq only; comprehensive quotes and volume reflect trading in all markets and are delayed at least 15 minutes. International stock ...

The internet represents a fundamental shift in how Americans connect with one another, gather information and conduct their day-to-day lives. For more than 20 years, Pew Research Center has documented ...