Yes, jellyfish absolutely existed with dinosaurs, but they were around for much longer, appearing over 500 million years ago, long before dinosaurs even evolved, and surviving countless mass extinctions to still be here today. These ancient, soft-bodied creatures predate dinosaurs by hundreds of millions of years, making them some of Earth's oldest multicellular animals.
Jellyfish predate dinosaurs by hundreds of millions of years. Jellyfish don't have bones, so fossils are hard to come by. Even so, scientists have uncovered evidence these creatures have been living in our Ocean for at least 500 million years!
Chickens are closer to the Tyrannosaurus rex than any other living animal. Through genetic studies, scientists found that birds, especially chickens, share significant molecular similarities with the T. rex, linking them directly to this group of dinosaurs.
Their ability to regenerate, reproduce both sexually and asexually, and survive in low-oxygen conditions has enabled them to withstand catastrophic environmental changes, from volcanic eruptions to asteroid impacts. Jellyfish are highly adaptable, thriving in varied habitats, from warm coastal waters to the deep sea.
How long have jellyfish lived in the ocean? This jellyfish fossil is from the Cambrian period, more than 500 million years ago. It was found buried in Utah —an area that used to be underwater, covered by the ocean. Fossil jellyfish are rare because they have no bones or other hard parts to turn into fossils.
[] Us and them: Although humans and jellyfish would seem to be about as different as possible, we actually share 60% of our DNA with them.
After the emergence of the first true animals around 700 million years ago, evolution ran amok, creating countless bizarre groups before the dinosaurs finally arrived 450 million years later, says palaeontologist Will Newton. These pre-dinosaur animals evolved in a very different world to the one we know.
If the answer is that 1) the dinosaurs lived and died before Adam and Eve, then we are consistent with evolutionary theory at least in the sense that dinosaurs lived long before humans.
The Cretaceous–Paleogene extinction event was triggered by the impact of a massive asteroid, thought to be between 10 and 15 kilometres wide, which collided with Earth 66 million years ago. It caused the sudden mass extinction of three-quarters of all plant and animal species, including all non-avian dinosaurs.
"There is only one known species that has survived all five mass extinction events, and that is the horseshoe crab. These creatures have been around for over 450 million years and have survived mass extinctions that wiped out the dinosaurs and many other species."
The woolly mammoth is the animal most prominently linked to a 2027 return, with biotechnology firm Colossal Biosciences aiming to have a cold-resistant elephant hybrid with mammoth traits walking the Earth by then, using gene-editing to help restore Arctic ecosystems. While not a true resurrection, this project aims to create a functional woolly mammoth-like creature, with other efforts also underway to de-extinct animals like the Tasmanian tiger (thylacine) and dodo.
“Dinosaurs are so old that there probably isn't any dinosaur DNA left on Earth,” Logan told Eye on Science. “Sure, if you were able to store DNA on the dark side of the moon, it could remain stable for millions of years. But on Earth, it cannot survive for long, even in permafrost.
Aquatic animals. Glass sponges found in the East China Sea and Southern Ocean have been estimated to be more than 10,000 years old. Although this may be an overestimate, this is likely the longest lived animal on Earth.
The simplest swimming animals on Earth, jellyfish lack bones, blood, a heart, and even a brain.
The Bible doesn't specifically address dinosaurs, when they existed, or how they became extinct. The closest examples of dinosaur-like creatures are translated in most Bibles as “serpent,” “dragon,” “Leviathan,” “Behemoth,” and “sea monster” (Job 3:8, Job 40:15-24, Isaiah 27:1, Ezekiel 29:3, etc.).
The reason appears to be in large part because crocodiles learn quickly and adapt to changes in their situation. They particularly learn to avoid dangerous situations very quickly.
Could Dinosaurs Return? While seeing a huge, living dinosaur could be both exciting and terrifying, it's highly unlikely to ever happen, even with genetic engineering.
Birds have the closest DNA to dinosaurs, as they are direct descendants of theropod dinosaurs, making them living dinosaurs; chickens and ostriches, in particular, share strong genetic links with T. rex, confirmed through protein analysis and shared physical traits like scales and bone structure. While crocodilians (alligators, crocodiles) are also close relatives, birds are the most immediate living link to the dinosaur lineage.
Probably not. The small proro-human mammals that survived the dinosaur killing impact would not have had the opportunity to spread as far and differentiate in a dinosaur filled world. Very likely mammals would still be small and in marginal niches if those apex dinosaur predators were still around.
According to the Bible, the dinosaurs came before Adam and Eve. [25] And God made the beasts of the earth after their kind, and the cattle after their kind, and everything that creepeth upon the ground after its kind: and God saw that it was good.
Sponges were among the earliest animals. While chemical compounds from sponges are preserved in rocks as old as 700 million years, molecular evidence points to sponges developing even earlier. Oxygen levels in the ocean were still low compared to today, but sponges are able to tolerate conditions of low oxygen.
Paleontologists don't know for certain, but perhaps a large body size protected them from most predators, helped to regulate internal body temperature, or let them reach new sources of food (some probably browsed treetops, as giraffes do today).
Dimetrodon. The dimetrodon was a large reptile-like animal that lived during the early Permian period, about 40 million years before the dinosaurs. It had a distinctive sail on its back, made of elongated spines that supported a skin membrane.