A new, extremely rare strain of HIV, called HIV-1 group M subtype L, was discovered by a research group from the health care and medical device company Abbott. One expert says the new study indicates ...

And how many of them are needed to build a house of cards? Just one — if you're willing to decorate it with decimals and call it science. A global analysis claims plastics are responsible for 13.497% ...

You’re reading Significant Digits, a daily digest of the numbers tucked inside the news. 47 opposition parties There were 47 opposition parties in last week’s South African elections. Only two of ...

The answer to this week’s contest crossword is an 11-letter word. Email your answer in the subject line to crosswordcontest@wsj.com.