In fact, paleontologists and geologists have gone so far to coin the term "living fossils," which is fitting in its pointed accuracy: Like fossils, they were here long before us—and they'll be here long after we leave, too. Here the list of top 10 oldest animal species on Earth. The bible isn't clear on the "first "animal, yet, on Day Four of creation - "God said, Let the waters swarm with swarms of living creatures, and let birds fly above the earth in the open firmament of heaven." These clusters of specialized, cooperating cells eventually became the first animals, which DNA evidence suggests evolved around 800 million years ago. The First Animals. These animals, known as tetrapods, are the ancestors to all birds, mammals, reptiles and even amphibians. They were the first species to branch off from the tetrapods. The first amphibians appear soon after, living on sea floors and in shallow marine ecologies. However, researchers from the University of Sheffield in the United Kingdom have published research claiming that there was the existence of human life on Earth 9,000 years before Adam. And for more fascinating facts from the animal kingdom, don't miss the 23 Smallest Animals on the Planet. We can either guess or take the word of the one who made the first living animals. Around 400 million years ago, the first four-legged animals started to develop. Evolution of animals merely depends upon environmental conditions of Earth. On November 3, 1957, less than a month after they inaugurated the Space Age, the Soviet Union took the next big step with the launch of Sputnik 2. When the Earth was first formed, it was extremely hot. New research shows that the simple sea sponge was the very first animal on Earth. Interesting question. Sponges were among the earliest animals. However, scientific findings suggest that Adam was not the first human on Earth. Laika, a dog that was the first living creature to be launched into Earth orbit, on board the Soviet artificial satellite Sputnik 2, on November 3, 1957. It is nearly impossible to know who the first human on Earth was. It was always understood that Laika would not survive the mission, but her actual fate was misrepresented for decades. The oldest living land animal is believed to be Jonathan, a Seychelles giant tortoise (Aldabrachelys gigantea hololissa), originally from the Seychelles but now a long-time resident of the remote South Atlantic island of St Helena.He is believed to have been born c. 1832, thus making him 187 years old in 2019. 20 And God said, "Let the water teem with living creatures, and let birds fly above the earth across the expanse of the sky." When digging down the history of Earth, we can see some animal species manage to thrive upon THE different geological time span of Earth, developed before million of years ago. (Genesis 1:21). 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