THE logistic curve is often used in teaching ecology as a first description of growth of an animal population. For many reasons, frequency related to age structure and time-lag effects, it does ...

These are the best cooling fans our editors use for a refresh at home and in the office. Discover our favorites from Dreo, Dyson, Windmill, and more ...

Tower fans cool efficiently and effectively without taking up too much space. See the 6 best tower fans in 2025, plus shopping tips from a tech expert.