A transmission electron micrograph image showing particles of SARS-CoV-2, the virus at the center of the Covid-19 pandemic. As of May 2020, More than 4 million people around the world have contracted the virus and more than 200,000 people have died.
Alekos Simoni/Imperial College London
Undergrad entomologist Joseph Schubert tweeted this picture of an unfortunate insect getting chomped by a ground-dwelling spider.