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The field of self-repairing materials is rapidly expanding, and what used to be science fiction might soon become reality, thanks to scientists who developed eco-friendly nanocrystal semiconductors capable of self-healing. Their findings describe the process, in which a group of materials called double perovskites display self-healing properties after being damaged by the radiation of an electron beam.

Infection with the virus that causes COVID-19 can trigger an immune response that lasts well beyond the initial infection and recovery -- even among people who had mild symptoms or no symptoms at all, according to investigators.