Uncategorized
- Humans
50 years ago, freezing sperm faced scientific skepticism
In 1972, scientists debated the long-term viability of frozen sperm. Fifty years later, children have been conceived with sperm frozen for decades.
- Microbes
A chain mail–like armor may shield C. difficile from some antibiotics
Examining the structures that protect Clostridioides difficile from medicines could help researchers find new ways to target and kill the bacteria.
- Health & Medicine
More than 5 million children have lost a parent or caregiver to COVID-19
The number of children who experienced the death of a parent or caregiver due to COVID-19 nearly doubled from May through October in 2021.
- Health & Medicine
The COVID-19 pandemic is not an on-off switch
The pandemic is more of a dimmer switch, and it will be a slow slide to the endemic phase, says epidemiologist Aubree Gordon.
- Computing
Now that computers connect us all, for better and worse, what’s next?
The digital revolution has brought chess-playing robots, self-driving cars, curated newsfeeds — and new ethical challenges.
- Astronomy
A fast radio burst’s unlikely source may be a cluster of old stars
The burst’s origin in a globular cluster suggests that not all these enigmatic blasts come from young stellar populations.
- Paleontology
The Age of Dinosaurs may have ended in springtime
Fossilized fish bones suggest that the massive asteroid strike at the end of the Cretaceous Period occurred during the Northern Hemisphere’s spring.
- Genetics
Africa’s oldest human DNA helps unveil an ancient population shift
Long-distance mate seekers started staying closer to home about 20,000 years ago.
- Planetary Science
An ancient impact on Earth led to a cascade of cratering
For the first time, scientists have discovered clusters of craters on Earth that were formed by the impacts of material thrown out of a larger crater.
- Astronomy
A rare collision of dead stars can bring a new one to life
These carbon- and oxygen-covered stars may have formed from an unusual merging of two white dwarfs.
- Paleontology
Fossils show a crocodile ancestor dined on a young dinosaur
The 100-million-year-old fossil of a crocodile ancestor contains the first indisputable evidence that dinosaurs were on the menu.
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