The presence of carbon-14, also known as the "bomb spike" or "bomb pulse," in the human body is helping scientists in various ways. In the 1950s, nuclear bomb explosions above ground altered the carbon composition of the atmosphere, and carbon-14 was formed. This isotope has been found in various organic substances, including human tissues, and its presence can provide insights into forensic investigations, such as determining the age of human remains or when a person died. It has also been used to date wine, determine the origins of poached wildlife, and unlock the true age of species like sharks. Additionally, the bomb spike has revealed new information about cells, including the age of different cells in our bodies and the turnover of neurons in the brain. The bomb spike is being considered as one of several markers to define the start of the Anthropocene, a new geological era defined by human activity. A group of earth scientists has recommended that the bomb spike, along with other human-made markers from the mid-20th Century, represent the official start of the Anthropocene. The bomb spike will likely be detectable for about 60,000 years and could serve as a lasting signal of human impact on the planet. A Canadian lake, Crawford Lake, has been proposed as the official location that marks the start of the Anthropocene.
Tue, 08 Aug 2023 23:08:34 GMT | BBC