6,875 results
6,875 results for: Bears
- Health & Medicine
Outwitting TB: Enhanced vaccine protects mice in lab tests
An enhanced vaccine appears to offer better protection against tuberculosis than the current version does, a study in mice suggests.
-
Turning Back Time: Embryonic stem cell rejuvenates skin cell
By fusing an embryonic stem cell with an adult skin cell, researchers have created cells that retain valuable embryonic characteristics but carry the adult cell's genes.
- Earth
Region at Risk
Scientists are still analyzing the magnitude 7.9 quake that struck San Francisco a century ago and, at the same time, are scrambling to estimate when the next large quake will strike the Bay Area.
- Materials Science
Making the Most of It
A recent crop of studies demonstrates how nature finds strength in unlikely places.
- Plants
World’s fastest plant explodes with pollen
A high-speed camera has revealed the explosive pollen launches of bunchberry dogwood flowers as the fastest plant motion known.
- Astronomy
Three’s Company: Asteroid 87 Sylvia and her two moons
Astronomers have for the first time discovered an asteroid with two moons, an indication that the rock is highly porous.
- Anthropology
Reservoirs of Evolution: Rainy periods linked to human origins in Africa
Three phases of heavy rainfall in eastern Africa between 2.7 million and 900,000 years ago created deep lakes and might have played a critical role in the evolution of human ancestors.
- Chemistry
Making a Little Progress
Scientists are using nanotechnology to develop new strategies for diagnosing and treating cancer.
- Planetary Science
Mars or Bust!
Scientists are working to overcome the biomedical challenges that would hinder a human voyage to Mars.
-
19523
Your article didn’t specify how strong the ultrasonic waves were or if any special conditions were required for these bubbles to form. I am curious to know if there’s a difference between the ultrasonic waves mentioned in your article and those in ultrasound exams of pregnant women. Andrea BikfalvyDowagiac, Mich. The article made me wonder […]
- Earth
Under Pressure: High-stress tests show surprising change in a mantle mineral’s behavior
Compressing a common iron-bearing mineral to the pressures found deep within Earth makes the material much stiffer, which might explain why seismic waves travel particularly fast through some zones of rock.
- Animals
Mom bears more sons when she gets extra bouquets
When researchers spiff up a male starling's courtship by delivering some extra bouquets to his mate on his behalf, the couple tends to produce more sons than usual.
