Latest Washington University in St. Louis Stories
Smoking, the leading preventable cause of mortality in the United States, continues to disproportionately impact lower income members of racial and ethnic minority groups.
It’s one of life’s special moments: a child finds a fat caterpillar, puts it in a jar with a twig and a few leaves, and awakens one day to find the caterpillar has disappeared and an elegant but apparently lifeless case now hangs from the twig.
The prevailing model for planetary accretion, also called fractal assembly, and dating back as far as the 18th century, assumes that the Solar System’s planets grew as small grains colliding chaotically, coalescing into bigger ones, colliding yet more until they formed planetesimals.
Here’s a riddle: What’s the difference between a tick and a lion? The answer used to be that a tick is a parasite and the lion is a predator. But now those definitions don’t seem as secure as they once did.
It’s no secret that battlefield trauma can leave veterans with deep emotional scars that impact their ability to function in civilian life.
In 2011 — to the consternation of women everywhere — a systematic review of randomized clinical trials showed that routine mammography was of little value to younger women at average or low risk of breast cancer.
Any multicellular animal, from a blue whale to a human being, poses a special challenge for evolution. Most of the cells in its body will die without reproducing; only a privileged few will pass their genes to the next generation.
Lead pipes once used routinely in municipal water distribution systems are a well-recognized source of dangerous lead contamination, but new research from Washington University in St. Louis suggests that the partial replacement of these pipes can make the problem worse.
- A trick or prank.