1. Question: At what temperature are Celsius and Fahrenheit equal? Answer: -40 degrees. 103. Question: How many planets can be seen from Earth without a telescope? Answer: Five (Mercury, Venus, Mars, ...

We asked 100 scientists about unsolved problems in their fields. They sent back provocations — on the origins of life, the ...

NPR's Ayesha Rascoe speaks with author Randall Munroe about his new book, "What If? 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions." So question for you. If you unleashed a ...

Add Yahoo as a preferred source to see more of our stories on Google. If you had a reputation for being a know-it-all as a kid, you're likely now the person with a trusted list of trivia questions and ...

Find out how much you know with these random facts and trivia questions on movies, music, history, science, geography and so much more. Are you the resident “Jeopardy!” champ at the local pub? Is ...