In the mid-19th century, the great British naturalist Charles Darwin discovered a groundbreaking theory that captured the world's attention: the theory of biological evolution. In 1831, Darwin embarked on a five-year global voyage aboard the HMS Beagle, extensively studying tropical and subtropical flora and fauna in South America. Upon returning home, he drew conclusions based on his vast observations and experiments in the biological realm. He proposed that the formation of species, along with their adaptability and diversity, primarily results from natural selection. The variations in organisms occur to adapt to their natural environments and compete with one another. Those that adapt to changes in their environment thrive and pass on their traits through heredity, while those that do not are eliminated. This concept can be summarized as: survival of the fittest. Darwin's theory laid the foundation for evolutionary biology, and he applied it to human development, explaining humanity's place in the animal kingdom and concluding that humans evolved from ancient apes.
In the years that followed, paleontologists, building on Darwin's theories, developed modern theories of human origins. However, does evolution truly reflect the reality of human origins? Did humans really evolve from apes? According to evolutionary theory, human evolution can be divided into three stages: ancient apes from 14 to 8 million years ago, Australopithecus from 4 to 1.9 million years ago, and hominins from 1.7 to 0.2 million years ago. Notably, there is a 4 million-year gap between ancient apes and Australopithecus, and a 200,000-year gap between Australopithecus and hominins. Yet, to this day, we have not discovered any fossils representing transitional stages in human origins, which poses a challenge to traditional evolutionary theory. In 1958, Dr. Rothan from the American National Oceanic Society captured intriguing human-like footprints at a depth of 4.8 kilometers in the Atlantic Ocean. In 1968, underwater photographer Mooney spotted a strange creature off the coast of Miami, with a monkey-like face, a neck four times longer than a human's, and disproportionately large eyes. In the 1930s, several sightings of a creature known as the "Lizard Man" were reported in the swamps near Beaufort, South Carolina. This creature stood about 2 meters tall, had a large tail, and three fingers on each hand, capable of walking upright and exhibiting incredible strength, easily overturning cars. Who could be the ancestor of such a semi-human creature living in the water and swamps?
Thus, some have proposed the hypothesis that human ancestors during the fossil gap did not live on land but in the ocean. In other words, there may have been a stage of aquatic ape evolution lasting several million years in human history. Their reasoning suggests that between 8 and 4 million years ago, large areas of land in Africa were submerged by seawater, forcing some ancient apes to adapt to life in the sea, evolving into aquatic apes. Millions of years later, as the waters receded, these aquatic apes returned to land, becoming the ancestors of humans. This is known as the "Aquatic Ape Hypothesis."
Proponents of the Aquatic Ape Hypothesis argue that many physiological features of humans are similar to those of marine mammals like seals and dolphins. For instance, while all primates are covered in dense fur, humans, like aquatic mammals, have bare skin without body hair. Furthermore, primates lack subcutaneous fat, while humans have a significant amount of it. Additionally, the human ability to produce tears and excrete salt is a characteristic shared with marine mammals, which is unique among primates. Moreover, women experience less pain during childbirth in water, and infants are naturally drawn to water and exhibit swimming abilities, indicating a unique relationship between humans and water.
In recent years, a series of discoveries have reignited interest in the theory of extraterrestrial origins of life. Firstly, despite the diversity of life, all living organisms share similar cellular structures, prompting the question: if life on Earth evolved from inorganic materials, why isn't there a greater variety of life forms? Secondly, molybdenum is present in very low quantities on Earth, yet it plays a crucial role in life; why is that? Thirdly, organic materials originating from interstellar space have been found in meteorites that have fallen to Earth, containing all the elements necessary for life on Earth. This has led many to believe that life is not solely confined to our planet. The hypothesis that humans originated from extraterrestrial beings is a recent theory proposed by Western scientists, particularly by Maley, who based it on a 50,000-year-old skull fossil discovered in San Diego. After studying the skull, he concluded that the species represented by this skull possessed intelligence far superior to that of modern humans, suggesting it belonged to an extraterrestrial being. He proposed that humans are the offspring of extraterrestrials who interbred with highly intelligent female apes, making extraterrestrials our ancestors.
It is evident that various modern hypotheses regarding human origins can be categorized into two main types: one attributes the origins of humanity to external cosmic factors, suggesting that humans are not the result of Earth's biological evolution but rather creations of highly intelligent beings from the depths of the universe, like the extraterrestrial hypothesis; the other maintains that human origins must be considered from Earth's own development, asserting that regardless of changes, humans are ultimately the result of Earth's biological evolution, as proposed by the theory of evolution.
As science and research continue to evolve, humanity will undoubtedly use its intelligence to unravel the mysteries of its own origins.
