10 Reasons Why Aliens Will Look Nothing Like Us
All life on Earth has three biochemical requirements – carbon, water and DNA. Each of these can be replaced by a different biochemical element which would lead to completely different adaptations in appearance.
Scientists claim that other elements can be a substitute for water and thus the lack of water on other planets isn’t relevant to the development of life. The most popular substitute for water as the basis of life is liquid ammonia, as it shares many of water’s qualities.