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On the left is a computer model picture of a coronavirus spike protein without a sugar shield on it. On the right is a computer model picture of the spike protein with a sugar shield on it. The models demonstrate how the infection mechanism of the coronavirus is highly protected by these sugars, in the digital image above, June 25, 2020.

Coronavirus Is Covered In Sugar Shield, UCSD Scientists Figured Out What It Looks Like

The virus is covered in sticky spike proteins that help it infect human cells. But those spikes are also covered in sugar, which makes it hard for the body to detect it.

CAS-9 is a powerful protein that acts like a pair of molecular scissors, capable of cutting strands of DNA in precise locations in the genome so that the DNA can be edited.

NOVA: Human Nature

Airs Wednesday, Sept. 9, 2020 at 8 p.m. on KPBS TV + Sunday, Sept. 13 at 8 p.m. on KPBS 2 + Stream with the PBS Video App

Arecibo Observatory's mammoth telescope collapsed overnight. It's seen here in November, after a cable damaged its dish.

Video: Arecibo Observatory Telescope Collapses, Ending Era Of World-Class Research

Astronomers compare losing the observatory in Puerto Rico to losing a big brother. It was once the world's largest single-dish radio telescope.

Several COVID-19 vaccines are being studied in trials around the country. Once the Food and Drug Administration authorizes a vaccine for use, health leaders must decide which groups of people get to receive the vaccine first.

Health Care Workers, Nursing Home Residents To Be Prioritized For COVID-19 Vaccine

A federal advisory committee to the CDC voted Tuesday on guidelines for who should get COVID-19 vaccines first. The committee decided to prioritize health care workers and nursing home residents.

Nancy Beck testifies in front of the Senate in 2017 when she was a senior policy director at the American Chemistry Council trade group. President Trump nominated Beck to head the Consumer Product Safety Commission.

Scientists Warn Against Consumer Protection Nominee

Nancy Beck is the Trump administration's nominee to lead the Consumer Product Safety Commission for a seven-year term. Many scientists and public health experts warn she is a dangerous choice.

Residents of Chicago's majority Black Englewood neighborhood (shown above in 2014) have a life expectancy that's about 30 years shorter than residents of the mostly white Streeterville neighborhood.

How Systemic Racism Continues To Determine Black Health And Wealth In Chicago

There is a 30-year gap in the life expectancies of some Black and white Chicagoans. Journalist Linda Villarosa talks about the link between racism and health outcomes and tells her own family's story.

A new International Energy Agency report on climate change calls for halting approval of all new coal power plants this year. Here, wind turbines are seen on a dike near Urk, Netherlands, in January.

To Be Carbon-Neutral By 2050, No New Oil And Coal Projects, Report Says

"This gap between rhetoric and action needs to close if we are to have a fighting chance" of reaching emissions goals, the head of the International Energy Agency says.

Texas Gov. Greg Abbott speaks alongside former President Donald Trump during a tour of an unfinished section of the border wall on June 30 in Pharr, Texas. Abbott says he'll continue Trump's border barrier, a pledge that is expected to help the governor in his reelection campaign.

Controlling The Border Is A Challenge. Texas Gov. Abbott's Crackdown Is Proving That

"Operation Lone Star," as it's called, relies on a force of state troopers, National Guard and reinforcements from other red states. The mission is to curtail the migrants surging into the Rio Grande.

Boulder Police Officer Eric Talley, who was killed along with nine other people in a mass shooting at a grocery store in Boulder, Colo., Monday.

Eric Talley: Family And Colleagues Remember Police Officer Slain At Boulder Grocery

His father says Eric Talley, 51, was a devoted dad who was learning to be a drone operator, because the job would be safer.

Deaths from COVID-19 are often due to the immune system overreacting to the coronavirus. New drugs to suppress that reaction are showing promise, say researchers.

Drugs Targeting Immune Response To COVID-19 Show Promise

Researchers are reporting some progress in their search for drugs that tamp down the overwhelming immune reaction that can kill a patient with COVID-19.

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