Even though the COVID-19 public health emergency classification will expire this spring, the lingering effects of the pandemic remain. A constant puzzle to solve since the first year of the pandemic has been “long COVID,” a condition in which those infected with the virus have symptoms that linger months or even years after they have cleared the initial infection.

“Long COVID is estimated to affect one out of every five people who get COVID,” says Brent Palmer, Ph.D., associate professor of allergy and clinical immunology at the University of Colorado School of Medicine. “It’s described as persistent symptoms that last longer than four weeks post-initial infection. Those symptoms can include chest pain, cough, shortness of breath, brain fog, and fatigue.”

The virus that lingers
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Nanomaterial feature could help electronic circuits adopt benefits of human memory. For all of the unparalleled, parallel-processing, still-indistinguishable-from-magic wizardry packed into the three pounds of the adult human brain, it obeys the same rule as the other living tissue it controls: Oxygen is a must.

So it was with a touch of irony that Evgeny Tsymbal offered his explanation for a technological wonder — movable, data-covered walls mere atoms wide — that may eventually help computers behave more like a brain.

“There was unambiguous evidence...

Ground-penetrating radar from China’s Martian rover Zhurong reveals shallow impact craters and other geologic structures in the top five meters of the Red Planet’s surface. The images of the Martian subsurface are presented in a paper published in Geology.

The Zhurong rover was sent to Mars as part of China’s Tianwen-1 mission. Launched in July 2020, the rover landed on the surface on 15 May 2021. The rover was sent to a large plain in the northern hemisphere of Mars named Utopia Planitia, near the boundary between the lowlands where it landed and highlands to the south.

The region was chosen because it’s near suspected a...

In a new study, researchers discovered an unknown mechanism of how cells ‘remember’ their identity when they divide – the cells’ so-called epigenetic memory. As time passes and we get older, many cells need to replenish themselves. They do so by dividing into new cells: Heart cells, skin cells and so on.

But when cells continue to divide and make new cells, they lose some of the information from their mother cell...