We all want to leave a legacy. Whether that takes the form of creative works, breakthrough discoveries, children, or other actions, we all want a way to show we were here. For nearly all of us, though, that legacy will be a literal ton of plastic garbage. Every disposable cup, straw, food wrapper, plastic bag, toy and bottle we use adds up to a lot of trash—9 billion tons of it and counting. The vast majority is still here, and will still be here thousands of years after we are gone. It is our most lasting legacy.
It is a problem of monumental proportions, and a solution is urgently needed. Perhaps science has discovered one. At a recycling plant in Japan in 2016, researchers discovered a microbe that has evolved to eat plastic.
By the time patients are diagnosed with Alzheimer's, most will already have experienced memory loss and motor-skill decline. But now, researchers at University College London (UCL) have perfected a cutting-edge form of PET (positron emission tomography) scanning, called amyloid PET, that allows them to use radioactive tracers in the brain to spot the telltale proteins that build up in neurodegenerative diseases like Alzheimer’s and other dementias, as much as 15 years before any symptoms.