Water droplets can slide down or bounce off a leaf's surface because it has a waxy hydrophobic (water-repellent) coating. However, this poses a challenge to farmers when pesticides are sprayed, as the ...

Examples of erosion and deposition in north-central Pennsylvania from Tropical Storm Lee. (A) Extensive gravel bars formed in a disequilibrium zone on lower Fishing Creek. (B) Washed out bridge in ...