Five fun facts about DNA

DNA, the blueprint of life, is a fascinating molecule as complex as it is intriguing. DNA can contain critical information for scientists and researchers, but for those with a curious mind, DNA can be full of fun, engaging, and unexpected facts! Here, you can expand your understanding of biology and explore five fun facts about your DNA. 


1. 8% of Human DNA Is Made Up of Ancient Viruses

Approximately 8% of the human genome consists of endogenous retroviruses (ERVs), remnants of ancient viruses that once infected our ancestors. These viral genes were integrated into human DNA millions of years ago, particularly in germline cells, allowing them to be inherited across generations. 

These embedded viral elements offer insights into human evolution, our complex relationship with viruses, and potential future medical advancements.


2. A Single DNA Molecule is Nearly 2 Meters Long When Unraveled

DNA is a marvel of biological organization and efficiency, capable of storing immense volumes of genetic information within the microscopic confines of a single cell. Each strand of DNA is nearly two meters in length when unraveled and contains about 3 billion base pairs of instructions essential for building and sustaining life. Astonishingly, this complex molecule is meticulously folded and compacted to fit into the 0.09 micrometer nucleus of a cell.


3. Your DNA Can Stretch Further Than Our Solar System

If the average human’s DNA (from every cell in their body) were stretched out and connected, it would extend for about 67 billion miles. This incredible distance would reach the dwarf planet Pluto, located at the edge of our solar system. After making the journey to Pluto, this hypothetical chain of DNA could wrap around the planet and return to Earth – ten times over.


4. DNA is Damaged Every Day

Every day, the DNA within each human cell sustains over 100 instances of damage from both internal and external sources, including metabolic byproducts, radiation, and replication errors. However, our bodies have developed sophisticated and multifaceted repair mechanisms to counteract this constant assault on our genetic material.


5. We Share 60% of Our DNA with Fruit Flies

Many people know that we share a huge percentage of our DNA with primates. When it comes to the living beings with which humans share the most DNA, the chimpanzee (Pan troglodytes) prevails. The DNA of humans and chimpanzees is 98.8% identical. 

Our DNA connects us not just to primates, but to living beings of all varieties. We share DNA with dogs – approximately 84%. Even something as miniscule as a fruit fly shares roughly 60% of their DNA with a human.


Learn More About Your DNA!