We are quickly, by evolutionary standards, becoming a mutant species.
About 5 million people lived on Earth 10,000 years ago. By 2050 there will be more than 9 billion people on our planet.
This rapid population growth has an interesting genetic fingerprint: each generation of the whole population has about 100 billion mutations. A few of these mutations may be beneficial, helping us adapt to—for example—living in high altitudes. The rest, some believe, can be potentially harmful and are making us prone to illness.
Our species may be 200,000 years old but studies suggest that the majority of our current genetic variation (single nucleotide mutations) have occurred only in the past 5,000 years.