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 …

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.

Oct 19, 2023 · Rainforests play an invaluable role in sustaining life, but every year, large portions of them are cut down for logging, mining, and cattle ranches.

Jan 4, 2024 · A moraine is material left behind by a moving glacier. This material is usually soil and rock.

May 1, 2024 · Yellowstone National Park is the first national park created in the United States. It remains popular due to its unique volcanic features and abundant wildlife.

The marine ecosystem is made up of a complicated series interconnected energy producers—like plants and photoplankton—and consumers—from plant-eaters to meat-eaters, both great and small.

Oct 19, 2023 · Invasive species—organisms not native to a particular area—are one of the leading causes of global biodiversity loss, and humans are the reason why.

Oct 18, 2024 · The construction of roads, canals, and railways in the 19th century accelerated the rise of the massive United States economy.

Feb 26, 2025 · Globalization has led to increases in standards of living around the world, but not all of its effects are positive for everyone.