The Centers for Disease Control and Prevention on Monday updated its guidance to acknowledge that COVID-19 can be spread through tiny airborne particles, known as aerosols, even when people are more than six feet away. As people spend more time indoors with the coming colder months, understanding how aerosols move through a room, particularly one with poor ventilation, is critical. Engineering professor Suresh Dhaniyala of Clarkson University explains what you need to know.

With the Nobel prizes in science being awarded this week, Gaurav Khanna from UMass Lowell describes how the work of Sir Roger Penrose, one of the recipients of the Nobel Prize in Physics yesterday, influenced not only him but a whole generation of astrophysicists.

And Trump’s treatment for COVID-19 has attracted the attention of the world. Two physician-scientists from the University of Virginia walk through what doctors know works for different stages of the disease.

Martin La Monica

Deputy Editor

Classroom experiments show how the coronavirus can spread and who’s at greatest risk. Tom Werner via Getty Images

When COVID-19 superspreaders are talking, where you sit in the room matters

Suresh Dhaniyala, Clarkson University

Experiments in college classrooms show how tiny respiratory droplets known as aerosols can spread, even with good ventilation. The risk isn't the same in every seat.

A black hole is an object so compact that nothing can escape its gravitational pull, not even light. They are formed when stars die and start collapsing under their own weight. Deep inside the black hole resides an infinitely hot and dense object, a so-called, singularity. Science Photo Library - MARK GARLICK/Getty Images

2020 Nobel Prize in physics awarded for work on black holes – an astrophysicist explains the trailblazing discoveries

Gaurav Khanna, University of Massachusetts Dartmouth

The 2020 Nobel Prize in physics was awarded to three scientists – an Englishman, an American and a German – for breakthroughs in understanding the most mysterious objects in the universe: black holes.

Both President Donald Trump and first lady Melania Trump have tested positive for COVID-19. MANDEL NGAN/AFP via Getty Images

Trump is taking the latest in COVID-19 treatments – here’s what doctors know works against the virus

William Petri, University of Virginia; Jeffrey M. Sturek, University of Virginia

The president and first lady Melania Trump have both tested positive for the coronavirus. Here's what the physicians and scientists know about the best treatments for the disease it causes.

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