12 Natural Indicators Used to Track Environmental Change
Discover the fascinating biological and physical sentinels that scientists use to monitor the health and shifting patterns of our planet.
Natural indicators
15 Natural Indicators Used to Predict Weather
Before the advent of satellite imagery and supercomputers, humanity relied on a "biological barometer"—a collection of cues from plants, animals, and the atmosphere. These natural indicators are based on subtle changes in air pressure, humidity, and temperature that occur just before a weather front arrives.