Chimpanzees are smarter than humans. Orangutans are smarter than chimpanzees. Humans are smarter than chimpanzees. Which of these statements is true?

The question was answered this month in an investigation by an exceptionally productive group of scientists, many of whom are based at the Max Planck Institute in Leipzig.

Alex is dead. The 30-year-old African gray parrot was a resident of Irene Pepperberg's lab at Brandeis University, and for decades Pepperberg taught Alex elements of English. As a result, he had the language capabilities of a two-year-old and the cognitive capacity of an older child. The famous bird was...

Earlier this year, Rod Stewart married model Penny Lancaster, promising to love and honor the latest version of his eerily uniform young-blonde-wife prototype. The new Mrs. Stewart is younger than Stewart's own young daughter, and at this rate, it's hard to believe the deeply lined rocker won't end up dating...