Learn how Excel functions can act as data using LAMBDA, LET, and BYROW, so you reuse logic and cut formula edits.

Math students may not blink at calculating probabilities, measuring the area beneath curves or evaluating matrices, yet they often find themselves at sea when first confronted with writing proofs.

NASA's Chandra X-ray Observatory has revealed fresh insights into how supermassive black holes influence the largest structures in the universe by using a new image-processing method called ...