Scientists analysing a meteorite have discovered the oldest material known to exist on Earth. They found dust grains within the space rock – which fell to Earth in the 1960s – that are as much as 7.5 billion years old. The oldest of the dust grains were formed in stars that roared to life long before our Solar System was born.
Daily Current Affairs Quiz 2020
This ancient interstellar dust, made of presolar grains (dust grains that predate our sun), was belched into the universe by dying stars during the final stages of their lives. Some of that dust eventually hitched a ride to Earth on an asteroid that produced the Murchison meteorite, a massive, 220-lb.
