Oct 19, 2023 · Rainbows are often portrayed as bridges between people and supernatural beings. In Norse mythology, for instance, a rainbow called the Bifrost connects Earth with Asgard, where the …

The Protestant Reformation that began with Martin Luther in 1517 played a key role in the development of the North American colonies and the eventual United States.

Dec 4, 2025 · Geography is the study of places and the relationships between people and their environments.

Nov 21, 2024 · Learn the risks our world's coral reefs are facing and what they mean for our future and the future of the ocean.

Oct 19, 2023 · Electromagnetic light energy is everywhere, but very little of it can actually be seen by the human eye.

Mesopotamia was one of the first places where humans started practicing settled agriculture, and the earliest known writing system, cuneiform, originated there as well. It is a historic region of modern …

Apr 26, 2024 · A bluff is a type of broad, rounded cliff.A bluff is a type of broad, rounded cliff. Most bluffs border a river, beach, or other coastal area. Bluffs may form along a river where it meanders, or …

Dec 9, 2024 · A rain shadow is a patch of land that has become a desert because mountain ranges block much of the rainfall necessary for plant growth.

For thousands of years, humans have modified the physical environment by clearing land for agriculture or damming streams to store and divert water. As we industrialized, we built factories and power …

Oct 19, 2023 · A tributary is a freshwater stream that feeds into a larger stream, river or other body of water. The larger, or parent, river is called the mainstem.