Notebook
- Animals
Surgeon aims to diagnose deformities of extinct saber-toothed cats
Using CT scans, one orthopedic surgeon is on a quest to diagnose deformities in long-dead saber-toothed cats.
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- Astronomy
50 years ago, a spacecraft discovered oxygen in moon rocks
In 1967, scientists dreamed of lunar processing plants to turn moon rocks into oxygen.
- Health & Medicine
Six in seven contact lens wearers take unnecessary risks with their eyes
A lot of contact wearers are not practicing healthy habits with their lenses, a national survey finds.
- Astronomy
How a meteor shower helped solve the case of the vanishing comet
A missing comet has been linked to a long-lost meteor shower, helping astronomers recover both.
- Paleontology
This giant marsupial was a seasonal migrant
A new analysis suggests that Diprotodon optatum, a giant plant-eating marsupial that went extinct about 40,000 years ago, migrated long distances, much like today’s zebras and wildebeests.
- Health & Medicine
About 1 in 5 teens has had a concussion
Almost 20 percent of U.S. teens have had at least one diagnosed concussion in the past, an analysis of a 2016 national survey finds.
- Psychology
Confusion lingers over health-related pros and cons of marijuana
50 years ago, the effects of chronic marijuana smoking on mental health were hazy. They still are.
- Life
This biochemist brews a wild beer
Wild beer studies are teaching scientists and brewers about the tropical fruit smell and sour taste of success.
- Animals
3-D scans of fossils suggest new fish family tree
Analysis of specimens from China implies ray-finned fishes evolved later than previously thought.
- Animals
A researcher reveals the shocking truth about electric eels
A biologist records the electrical current traveling through his arm during an electric eel’s defensive leap attack.
- Environment
Air pollution takes a toll on solar energy
Dust and other tiny air pollutants can reduce solar energy output by as much as 25 percent in parts of the world.
