Adding a drop-down list in Excel is a great way to speed up data entry, keep your sheet tidy, and avoid typos. Here's how to set one up.

Rice University. "'Hopelessly attached': Scientists discover new 2D material that sticks the landing." ScienceDaily. ScienceDaily, 23 May 2025. <www.sciencedaily.com / releases / 2025 / 05 / ...

Thousands of years ago, Chinese astronomers used an ancient record of constellations and their coordinates to study the sky.