As we're a species with ever-shrinking attention spans, it can be difficult to comprehend just how long life has been around on Earth.
Cold temperatures, low oxygen, and a lack of UV radiation make polar marine environments like the Scotia Sea terrific locations forThe recovered DNA was extracted from the ocean floor in 2019 and went through a comprehensive contamination control process to ensure that the age markers embedded in the material were accurate.
The team was able to link diatom abundance to warmer periods – the last of which in the Scotia Sea was around 14,500 years ago. That led to an increase in overall marine life activity across the Antarctica region. Scientists are steadily improving at removing these ancient DNA fragments from the ground and removing the 'noise' and interference left by all the modern DNA that's been around since to get an authentic look at the past.
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