Medicine & TechnologyResearchers led by Harvard University studied remnants of ancient asteroids and found that massive space rocks have bombarded Earth before, which delayed the accumulation of oxygen on the planet.
Among different scientific mysteries one of the subjects about the formation of Earth’s atmosphere that scientist has been long baffled. However, a three-billion-year-old air sample trapped in quartz mineral shows the link between comet and Earth atmosphere.
For the past several months the European Space Agency’s (ESA) Rosetta spacecraft mission has been tailing the famous Comet 67P/Churyumov-Gerasimenko with many answers at the core of its research. While in orbit the mission has been able to gather an immense amount of data, creating a never-before-seen view of comets as the first spacecraft to ever successfully orbit one in our history. Yet, many molecular ingredients that are thought to have given rise to comets have not been found.
Stars passing close to our solar system could send comets hurdling toward Earth increasing the risk of impact altering life as we know it. Scientists still say there is not much for us to worry about as these collisions won't happen for hundreds of thousands of years.