Humans

Moral judgments about an activity’s COVID-19 risk can lead people astray

What do you think was riskier during the pre-vaccine days of the...

Playing brain training games regularly doesn’t boost brainpower

It’s an attractive idea: By playing online problem-solving, matching and other games...

New delta variant studies show the pandemic is far from over

The coronavirus’s delta variant is different from earlier strains of the virus...

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Catnip repels insects. Scientists may have finally found out how

A whiff of catnip can make mosquitoes buzz off, and now researchers know why. The active component of catnip...

Evolving an arch across the foot’s width helped hominids walk upright

The arch running across the width of the human foot might be a big part of the reason that people can walk...

Why African-Americans may be especially vulnerable to COVID-19

COVID-19 was called the great equalizer. Nobody was immune; anybody could succumb. But the virus’ spread across the United States is exposing...

Pollen-deprived bumblebees may speed up plant blooming by biting leaves

Here’s a bumblebee tip that might get a slowpoke plant to bloom early. Just bite its leaves. At least...

Presenting at an academic conference

You must also be well-prepared in terms of public speaking factors such as observing time limits, having a strict structure, making eye...

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A multiple sclerosis drug may speed COVID-19 recovery

A drug that boosts the immune system may help some people with COVID-19 fight off infections quickly, at least when taken in...

Viruses can kill wasp larvae that grow inside infected caterpillars

When parasitic wasps come calling, some caterpillars have a surprising ally: a viral infection. Insects called parasitoid wasps lay...

Planets with hydrogen-rich atmospheres could harbor life

Microbes can live and grow in an atmosphere of pure hydrogen, lab experiments show. The finding could widen the range of environments...

Bad moods could be contagious among ravens

Here’s a downer: Pessimism seems contagious among ravens. But positivity? Not so much. When ravens saw fellow birds’ responses...

Fewer worms live in mud littered with lots of microplastics

Despite growing concerns over tiny bits of plastic filling the world’s waterways, the long-term environmental effects of that debris remain murky. Now...