We can find a lot of old stuff here on Earth. Remarkably, scientists have found something on Earth that is much older than our planet or solar system.
Before all the science stories of 2020 begin to roll, let’s take a moment to acknowledge some of the big science stories from last year that humanity can now build on in the new year. What were the big science stories of 2019?
Earth is still cooling after its fiery formation, and volcanoes are one way the Earth loses heat. Other planets have volcanic features -- some recently active -- telling geologists that they, too, could be hot and losing heat.
Science helps us answer big questions, and they don't get bigger than this: are we alone in the universe? That's a huge age-old question that science has been piecing together bit by bit over the years. Does this mean we're getting closer to knowing if there's life out there?