Astronaut balancing act: Training to help explorers adapt to a return to gravity
Astronaut balancing act: Training to help explorers adapt to a return to gravity
Challenges associated with long-duration spaceflight do not end with landing. Astronauts often suffer from balance problems that lead to dizziness and difficulty standing, walking and turning corners when they return to normal gravity. Researchers are developing techniques, using a treadmill and simulated balance disturbances, to help astronauts adapt to a new gravity environment. The techniques could also have benefits for Earth-bound populations such as the elderly.
New ethical questions are being raised in stem cell research
A groundbreaking discovery two years ago that turned ordinary skin cells back into an embryonic or "pluripotent" state was hailed as the solution to the controversial ethical question that has plagued stem-cell science for the past decade. What are the ethical and legal barriers facing new stem cell procedures?
Battle of the sexes: Ovaries must suppress their inner male
Scientists have discovered that if a specific gene located on a non-sex chromosome is turned off, cells in the ovaries of adult female mice turn into cells typically found in testes. Their study challenges the long-held assumption that the development of female traits is a default pathway and grants a valuable insight into how sex determination evolved.
Tea Tree Oil
Title: Tea Tree Oil
Category: Vitamins and Supplements
Created: 1/27/2009 4:00:00 PM
Last Editorial Review: 1/27/2009 3:59:57 PM
Challenges associated with long-duration spaceflight do not end with landing. Astronauts often suffer from balance problems that lead to dizziness and difficulty standing, walking and turning corners when they return to normal gravity. Researchers are developing techniques, using a treadmill and simulated balance disturbances, to help astronauts adapt to a new gravity environment. The techniques could also have benefits for Earth-bound populations such as the elderly.
New ethical questions are being raised in stem cell research
A groundbreaking discovery two years ago that turned ordinary skin cells back into an embryonic or "pluripotent" state was hailed as the solution to the controversial ethical question that has plagued stem-cell science for the past decade. What are the ethical and legal barriers facing new stem cell procedures?
Battle of the sexes: Ovaries must suppress their inner male
Scientists have discovered that if a specific gene located on a non-sex chromosome is turned off, cells in the ovaries of adult female mice turn into cells typically found in testes. Their study challenges the long-held assumption that the development of female traits is a default pathway and grants a valuable insight into how sex determination evolved.
Tea Tree Oil
Title: Tea Tree Oil
Category: Vitamins and Supplements
Created: 1/27/2009 4:00:00 PM
Last Editorial Review: 1/27/2009 3:59:57 PM
posted by MarcoPolo at 5:04 AM
