Ultra-Primitive Particles Found In Earth's Cosmic Dust

Dust samples collected by high-flying aircraft have found relicts from the ancient cosmos, according to scientists from the Carnegie Institution. This stratospheric dust includes minute grains that likely formed inside stars that lived and died long before the birth of our sun as well as material from molecular clouds in interstellar space. This 'ultra-primitive' material likely drifted into the atmosphere after the Earth passed through the dust trail of comet Grigg-Skjellerup, giving scientists a rare opportunity to study cometary dust in the laboratory. read more

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