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What Makes Lotus Flower Leaves Water Repellent?
The lotus flower has a special or sacred place in world religions like Hinduism and Buddhism. It is a symbol of purity, and many…
Who Were Humboldt and Ritter?
Friedrich Wilhelm Heinrich Alexander von Humboldt (1769-1859), and Carl Ritter (1779-1859) were two Germans whose combined travels and researches changed the whole concept of…
What Is Hantavirus and How Does It Spread?
Hantavirus is a virus that is found in the urine, saliva, or droppings of infected deer mice and some other wild rodents (cotton rats,…
Why Do Locusts Swarm and How Long Does It Last?
Certain conditions favor the creation of locust swarms: unusually heavy desert rains, favorable winds, good crops after periods of drought, a ban on long…
Why Were Early Maps Decorated?
Many early maps were decorated because the map-makers or cartographers had little real idea of geography and presented the world in symbolical terms. One…