Buzz
Currently, the closest we come to experiencing realistic dinosaurs are through movie screens, fossilized remains, and life-sized replicas, like the one displayed at Dinosaur Park. Check out more dinosaur images.
NORBERT MILLAUER/AFP/Getty ImagesThe 1993 film 'Jurassic Park' wasn't the first to depict dinosaurs in the modern world, but it played a significant role in popularizing the concept of dinosaur cloning. It effectively presented the idea in a way that resonated with many, becoming a global sensation and grossing over $900 million worldwide [source: New York Times].
Gallery of Dinosaur Images
In 'Jurassic Park,' the idea revolves around extracting DNA from mosquitoes preserved in amber. Although this seems plausible initially, it's extremely unlikely that scientists could extract usable dinosaur DNA from these ancient insects. To achieve this, a very specific mosquito would need to be found -- a female mosquito that had fed on dinosaur blood just before becoming trapped in tree resin. Since fossilization in amber is a rare occurrence, the chances of such a find are slim.
The scarcity of suitable specimens isn't the only obstacle. Most insect fossils in amber are too young to contain any dinosaur blood, as dinosaurs had already vanished by the time these insects became trapped. Additionally, many insects decay from the inside out after becoming encased, leaving no usable material for scientists to extract. Furthermore, the sample would need to be kept very dry, as DNA deteriorates rapidly in the presence of moisture.
Even if researchers were to stumble upon a perfectly preserved mosquito filled with dinosaur blood, extracting its DNA would still be a challenging task. The blood, containing the dinosaur DNA, would be surrounded by the insect's own DNA, potentially contaminating the sample. Moreover, there could be DNA from other sources trapped in the amber. Finally, there's the risk of contamination from the laboratory environment and even from the scientist conducting the extraction.
In 'Jurassic Park,' the fictional scientists tackle these challenges by combining dinosaur DNA with frog DNA. However, this process is akin to trying to solve a jigsaw puzzle with pieces from two different sets. Additionally, frogs might not be the ideal candidates for replacing dinosaur DNA. Currently, the leading theory suggests that some dinosaurs evolved into birds, not frogs.
Moreover, the most common method of cloning animals today involves nuclear transfer, where the nucleus of one cell is inserted into another cell of the same species, after the second cell's nucleus is removed. There are no existing dinosaur cells or eggs to facilitate the introduction of new DNA. As a result, scientists would need to discover an entirely new method to grow a living dinosaur from the DNA.
The idea of bringing dinosaurs back to life using the "Jurassic Park" method has been dismissed, but are there other viable ways to resurrect these ancient creatures? Keep reading to uncover the possibilities.
Extracting DNA from amber may sound like a fiction plot, but it's based on real-world science. The first notable success was reported in 1992, when researchers claimed to have found DNA from an extinct bee trapped in Dominican amber. Although there were more claims of similar discoveries, controversy has surrounded the process. Some research has disproven the findings, while in other cases, scientists have struggled to replicate the initial DNA extractions.
The Cloning of Mammoths and Dinosaurs
In Nagakute, Japan, a frozen mammoth, discovered in Siberia's permafrost, was displayed at Global House on March 18, 2005. The image was captured by Koichi Kamoshida/Getty Images.In addition to extracting DNA from insects preserved in amber, scientists have considered various other theories for cloning dinosaurs. One such theory involves recovering DNA from fossilized bones instead of from insects. The main challenge with this approach is that DNA is a fragile and complex molecule. During fossilization, organic tissue in bones is replaced by minerals, which destroys the cells that may have contained DNA.
A team of paleontologists has made an unexpected discovery: soft tissue in the bones of a Tyrannosaurus rex. This was a surprising find, as scientists previously believed that soft tissue could not survive the fossilization process. Although no DNA has been extracted from these soft tissue samples, the discovery raises the possibility that intact DNA could be found in fossils, which seemed improbable only a few years ago.
An intriguing possibility is that researchers could sequence dinosaur DNA and reconstruct the necessary strands. However, this is currently not feasible. For instance, the sequencing of the human genome took 13 years and did not yield a usable product for cloning. Reconstructing complete dinosaur DNA would require technology far beyond what we have today.
An alternative to cloning dinosaurs might be cloning extinct mammals, such as mammoths. Mammoth fossils are much younger than those of dinosaurs, with a more recent age of about 30,000 years. This means the DNA has had less time to degrade. However, even with this advantage, cloning a mammoth would require a specimen perfectly preserved without damage from freezing or thawing cycles. The idea of reconstructing mammoth genes is not entirely out of reach, as a team of researchers successfully sequenced part of the mammoth genome in 2005.
Another potential method for reviving extinct mammals involves using fossilized sperm to inseminate the eggs of a closely related mammal. This would produce a hybrid animal, with half of its genetic code originating from its male mammoth parent. A similar project was proposed by a Japanese research team in 2006, presenting an innovative approach to bringing back extinct species.
Recent advancements in paleontology and genetic technology have brought the concept of cloning dinosaurs a bit closer to reality, though it's still highly unlikely to happen, especially within our lifetimes.
Interested in learning more about cloning, dinosaurs, and other fascinating topics? You'll find a wealth of information on the next page.
