This article will explore the science behind these frozen epochs, the life that survived them, the causes of their terrifying advances and retreats, and what the future holds for our warming planet.
It wasn’t merely snowing everywhere. The mid-latitudes, like France and Texas, were dry, cold steppe-tundra. Deserts expanded. Dust storms were common. The air was so dry that rainfall in some regions dropped by 90%. Oxygen levels in the ocean dropped due to changes in circulation, leading to massive marine die-offs. Ice Age
In scientific terms, an Ice Age is a long period of reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. This article will explore the science behind these
It lay in a crack of blue ice, a tiny, dark fleck no bigger than her smallest fingernail. She almost missed it. But something made her stop—perhaps a sliver of instinct passed down from ancestors who knew forests, not this glittering desert. Deserts expanded
For an to begin, there must be landmasses at the poles. When the Isthmus of Panama closed around 3 million years ago, it altered ocean currents, diverting warm water away from the Arctic. Simultaneously, the rise of the Himalayas and the Colorado Plateau increased erosion. This chemical weathering pulled carbon dioxide (a greenhouse gas) out of the atmosphere. Less CO2 means a colder planet.
Approximately 2.4 billion years ago, Earth underwent its first and possibly longest Ice Age. This event occurred right after the "Great Oxygenation Event," when microscopic cyanobacteria began pumping oxygen into the atmosphere. This oxygen reacted with methane—a potent greenhouse gas—stri
The is not a relic of the distant past; it is the climatic backdrop of human existence. The ice caps at our poles are the last remnants of a world that was once covered in miles-thick ice.