When organ donations after death are a topic, the altruism argument is easily made. But during life, it is more complex.

Kidney transplantation is the best treatment for patients with kidney failure. Unfortunately, there's a shortage of kidneys available to those in need of a transplant, and donation rates from both living and deceased donors have remained relatively unchanged over the last decade.  Some people aren't going to have willing donors or even matching ones but when the notion of paying for donations is introduced, the implication is this will be a new front in the class war - organs of poor people will be harvested for the rich.

When we imagine the sun, we imagine fire, but that isn't really accurate. The sun is plasma; particles so hot that their electrons have boiled off, creating a charged gas that is interwoven with magnetic fields. 

In late September, a 200,000 mile long magnetic filament of solar material erupted on the sun and it ripped through the sun's atmosphere, the corona, leaving behind what looks like a canyon of fire. The glowing canyon traces the channel where magnetic fields held the filament aloft before the explosion. Visualizers at NASA's Goddard Space Flight Center in Greenbelt, Md. combined two days of satellite data to create the short movie below of this gigantic event on the sun.

Blood and bone marrow transplants have been done for decades and have always had risks of complications, like virtually any treatment for serious diseases, but a new study has found an additional one for the list: sexual health.

The Boomerang Nebula is the coldest known object in the Universe; even colder than the faint afterglow of the Big Bang, which is the natural background temperature of space.

Advertising relies on repetition because some repetition increases likability. 

While established brands can coast a little - you never see advertising for Dinty Moore Beef Stew because it is awesome - new brands rely on gaining popularity due to excessive exposure and repetition. 

Less than two weeks in space may be enough to cause profound changes in eye structure and gene expression, according to a new report based on a small study.

The study looked at how low gravity and radiation and oxidative damage impacts mice and examines eye-related gene expression and cell behavior after spaceflight, but the subject size was too limited to be conclusive - 18 mice in nine different condition groups, due to limited aboard orbital missions.