Today in Science: Think you're so smart?

Test your logic and reasoning with this special issue of Today in Science ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­

April 26, 2026—This is a special weekend edition of Today in Science. Test your analytical brain with this month's most popular games and puzzles. Think you're smart? Tackle the challenges below. —Andrea Gawrylewski, Chief Newsletter Editor WORD PUZZLES ​ Spellements: Build as many words as possible using the middle letter. Can you find any words that incorporate all the letters? Hint: one is featured in a recent Scientific American article. Play a science crossword that ties into stories from the May 2026 issue of Scientific American. Read it here MATH PUZZLE ​  Divide this grid into four identical, nonoverlapping shapes along the square boundaries. Each shape must contain two of the same letters. Solution here. LOGIC PUZZLES ​ Expert Sudoku: Fill each row, column and sub-grid with exactly one of each number from 1-9. Solution here. ​ Killer Sudoku: Fill each row, column and sub-grid with exactly one of each number from 1-9. In Killer Sudoku, the digits in each inner shape (marked by dots) must add up to the number in the top corner of that box. No digit can be repeated within an inner shape, row, column or sub-grid. Solution here. ​ KenKen 4x4: Fill each row and column with exactly one of each possible number—in this case, numbers 1 through 4. You are not allowed to repeat any number in the same row or column. Each inner shape (marked by the boundaries) has an associated number and an operation. The result of applying the operation to the digits within that shape must equal the associated number. Find the solution here. ​ KenKen 6x6: Same rules as the previous one, but this time fill each row and column with exactly one of each numbers 1 through 6, while adhereing to the internal calculations. Solution here. JIGSAW PUZZLE Arvitalya/Getty Images Unscramble our most popular jigsaw puzzle this month of our January 1942 issue. This cover shows two engineers testing plane parts in what was then the coldest place in the U.S.—an icy science chamber in sunny Santa Monica, Calif., that reached -104 degrees Fahrenheit. To work in such cold conditions, scientists inside the room wore specialty suits made of sheepskin and aluminum. More Jigsaws NEWS QUIZ How well did you follow the news in April? Test your chops with this month's most popular news quiz.

More Science Quizes Access each and every one of our games, puzzles and quizzes with a subscription to Scientific American. Try it out for 90 days for just $1! If you liked this edition of Today in Science, consider forwarding it to a friend! And tell us what YOU think by clicking on a link below and hitting "send." I liked it I didn’t like it (please tell us why in the body of the email!) You can also reach the newsletter team by emailing: newsletters@sciam.com. See you tomorrow!   —Andrea Gawrylewski, Chief Newsletter Editor

Subscribe to this and all of our newsletters here. Scientific American One New York Plaza, New York, NY, 10004 ​ Support our mission, subscribe to Scientific American here ​ Unsubscribe    Preferences     View in Browser