Are you petrified of dying, or would like to be immortal? With the advancement of biotechnology, you might someday get your wish.
Cloning is the process of producing genetically identical copies. The copied material, which has the same DNA, is referred to as a clone. Clones may happen naturally, like identical twins, or it could be created in the laboratory using somatic cell nuclear transfer (SCNT). This technique consists of creating an ovum (a mature female reproductive cell) with a donor nucleus.
Roslin Institute in Edinburgh, UK, successfully cloned a sheep known as Dolly in 1997, by somatic cell nuclear transfer. Scientists extracted the DNA from a cell and implanted it into an unfertilised adult egg cell which had had its nucleus removed. They then zapped the cell with electricity, which made it divide and multiply. Dolly the sheep became the world’s first mammal to be cloned from an adult cell. This proved in theory that we can take any cell from a human body and make an offspring. 
The new scientific advancement gained a lot of excitement from people all over the world, as scientists started to clone more mammals such as cows, horses, rabbits, pigs, goats, and cattle. Going beyond, some scientists have been working to clone endangered or extinct species, such as mammoths that went extinct 10,000 years ago. It would be a demanding process, but theoretically possible with a well-preserved DNA of the species and an egg cell of a closely-related animal. Some scientists even considered the idea of cloning dinosaurs and bring Jurassic park to life.
There are more reasons to clone than just have these cool species come back to life. Cloning can be very beneficial for medical purposes. For example, scientists could use the cells from a healthy, well-producing cow and insert a gene that codes for a drug or a vaccine and create a drug-producing cow. Cloning can also allow scientists to replace damaged parts of the body by taking a small amount of cells from an organ and create a new, functioning organ. This replacement could reduce the number of patients waiting for an organ donor.
It would be biologically possible to clone a human being, but nobody has yet ever cloned a human. Despite its possibility, it is very unlikely that procedure will even come to be due to ethical reasons. Some people believe cloning is against religion and interferes with God’s role as our creator. It is also unsafe; cloned animals are not as healthy as animals born through sexual reproduction and have an extremely high failure rate. Dr. Robert Lanza, chief scientific officer at the biotech company Advanced Cell Technology, described cloning as “sending your baby up in a rocket knowing there’s a 50-50 chance it’s going to blow up”. Although Dolly was successful, she did not live to be 7 years old.
By cloning, scientists could create an immortal human being by replacing the reproduced organs and placing it in the original body. The body will be the same, the mind, not. However, this would be equivalent to killing a healthy, living human in order to harvest its organs for the benefit of others.
Imagine that you, a fully functioning human being, as born in this world as nothing more than an organ farm. You are not treated as a human and people only created you to get your kidney cut out. Is it worthy to devote your life for someone to have a lengthier life?
Sources:
Cloning advance using stem cells from human adult reopens ethical questions. (n.d.). Retrieved November 11, 2016, from https://www.washingtonpost.com/national/health-science/cloning-advance-using-cells-from-human-adult-raises-ethical-questions/2014/04/17/33a58222-c663-11e3-bf7a-be01a9b69cf1_story.html
Dolly (sheep). (n.d.). Retrieved November 12, 2016, from https://en.wikipedia.org/wiki/Dolly_(sheep)
Somatic cell nuclear transfer. (n.d.). Retrieved November 11, 2016, from https://en.wikipedia.org/wiki/Somatic_cell_nuclear_transfer
Why Clone? (n.d.). Retrieved November 13, 2016, from http://learn.genetics.utah.edu/content/cloning/whyclone/