Ammonia and methanol may be toxic for humans, but for other living beings, they could be the source of life. A common mistake is to extrapolate too much from the conditions that make our life on earth possible, he says. But the liquid does not necessarily have to be water, says Schulze-Makuch, it could also be ammonia or methanol. If there are no liquids, there can be no life. But microbes can survive even under harsh conditions, such as in the Atacama Desert in Chile or in hot springs at more than 100 degrees. Relatively stable air pressure, not too much radiation and favorable temperatures are needed as well. There must be an atmosphere or an ice shield, he says, to protect life on a planet. First, he tries to define conditions for life to exist. Schulze-Makuch looks for life in its simplest form, meaning microbes. How do we find out if there's life out there? To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video "With the trillions or more planets and moons, it would be strange if we were the only place where life would occur." "I would find it surprising if extraterrestrial life didn't exist," astrobiologist Dirk Schulze-Makuch from the Technical University of Berlin told DW. While the internet is awash with Area 51 alien hunting memes and conspiracy enthusiasts are preparing for the trip to Nevada, several scientists around the world are actually researching the possibility of extraterrestrial life. Tucked in the remote, dry Amargosa valley, the military zone has become an object of popculture, often linked to aliens in films and television series. Hotels and restaurants in the area have taken on the 'alien' theme. Read more: CIA confirms existence of top-secret Area 51 - but no UFOs in sight The US military has been working on new spy planes on the site for decades, which could have been the reason for the mysterious sightings. Local residents and visitors had reported seeing mysterious flying objects at the site and speculated they were UFOs. It was not until 2013 that the American secret service officially confirmed the existence of the military zone Area 51. Many are absolutely convinced that the US government is hiding UFOs or aliens there. For some it's a joke, for others it's as serious as it gets: 1.9 million people have announced on Facebook that they will storm the US military compound Area 51 in Nevada on September 20, 2019.
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