Scientists found that volcanic eruptions triggered short-lived oxygen spikes before Earth's air became breathable.

plus trace amounts of other gases. The atmosphere has four layers. The troposphere is the layer closest to the surface of the Earth. Next is the stratosphere, which is where commercial airplanes fly.

Scientists discovered that volcanic eruptions in India’s Deccan Traps 66 million years ago released gases that altered ...

Ancient eruptions may have triggered conditions for oxygen ‘whiffs’ in the atmosphere In a nutshell Massive volcanic events ...

though not as drastically different in composition as you might assume. Earth's atmosphere is composed of 78% nitrogen gas (N2) and 21% oxygen gas (O2). The final 1% is a mix of argon, carbon ...

Until now, researchers have been able to determine the atmospheric chemical composition ... of large gas planets that orbit close to their host star, making them extremely hot. Its atmosphere ...