Are we alone in the universe? Is there life beyond Earth?
On April 28th, 2020, China's radio telescope (射电望远镜) FAST, nicknamed "Eye of Heaven (天眼)"，began to look for alien life.
Radio telescopes can find signals from space. On Earth, our TVs and radios give out signals. Scientists believe that if aliens do exist, their technology would also give out signals like ours does.
Many radio telescopes around the world are being used to look for aliens. In 1977, for example, the Big Ear radio telescope in the USA found a strong 72-second signal from space. Many people believe it may have come from the intelligent life, but this is still a mystery.
FAST is the world's largest and most sensitive radio telescope. It can find even the weakest signals from space. Scientists are excited about what it might find in the future.
