A Sydney Ph.D. student has recreated a tiny piece of the universe inside a bottle in her laboratory, producing cosmic dust ...
In high enough doses, hydrogen cyanide can kill an adult human in minutes, but the chemical may be the reason why we’re here in the first place.
Life on Earth has long been understood to run on two main energy sources. One comes from sunlight, captured by photosynthesis. The other comes from chemical reactions, such as microbes feeding on ...
Earth was not always the blue-green world we know today: the early Earth's oxygen levels were about a million times lower than we now experience. There were no forests and no animals. For ancient ...
The Great Oxygenation Event marked a massive transition in life on Earth, when oxygen became plentiful and organisms suddenly had to adapt. Current conditions in Japanese hot springs give clues as to ...
About 700 million years ago, Earth was entombed in a veneer of ice hundreds of feet thick—a frozen state scientists refer to ...
Beginning two billion years of Earth’s history, the amount of oxygen was not sufficient, but rich in carbon dioxide and ...
Scientists are sharpening their forecasts for how long Earth can remain a comfortable home for complex organisms, and the latest work points to a much earlier cutoff than the classic textbook ...
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