Could Aliens Possibly Exist?
| LAST UPDATE 04/11/2023
Although there is no current and concrete evidence that extraterrestrial life does exist, scientists are still hopeful that they will soon find some answers. The 13.8 billion-year-old universe is a massive place, so it seems rather unlikely that with the tons of planets that exist, only Earth is home to known species.
Scientists have spent centuries trying to decide whether or not other planets have life. The idea between the extensiveness of the universe and the lack of evidence for alien life is known as the Fermi Paradox. And scientists are not giving up on cracking the ET code, they're only getting more invested. The first attempt at reaching extraterrestrial life began with the invention of the radio. According to the Search for Extraterrestrial Intelligence, once the radio was born, the thought that we could receive transmissions from other worlds was too born. Inventors Nikola Tesla and Guglielmo Marconi first thought they were getting signals from Mars in the 1900s.
In 1960, astronomer Frank Drake used two radio telescopes to look for signals from aliens on other planets that seemed to be orbiting stars 10 and 12 light years away. However, Project Ozma, as it was called, came up blank. Over three decades later, Project Phoenix attempted to search for 800 star systems within 200 light-years of Earth, and too, nothing was discovered. Today, the Allen Telescope Array monitors microwave frequencies from across the Milky Way.
Scientists are also searching for more simple life forms. By using the advanced technology of the 21st century, researchers are using remote technologies to look for molecules that might signal there is actually something out there in the open Universe. By using sensitive telescopes such as the James Webb Space Telescope, researchers can see light variations coming off of faraway exoplanets, allowing them to detect oxygen, sulfur, and other gases that show microbes are working out there. Recently, researchers may have found the first magnetic field around an Earth-like planet, which is one of the must-haves for life to survive in tough radiation of close-by stars. The Mars rover robot is also collecting samples of molecules that suggest there could have been microbial life billions of years ago. So, scientists still remain confident that we are not the only ones roaming the Universe.