Science | WPN World People News

In 1604, a new star appeared in the night sky that was much brighter than Jupiter and dimmed over several weeks. This event was witnessed by sky watchers including the famous astronomer Johannes Kepler. Centuries later, the debris from this exploded star is known as the Kepler supernova remnant.

Observations by NASA's Mars Reconnaissance Orbiter have detected carbon-dioxide snow clouds on Mars and evidence of carbon-dioxide snow falling to the surface.

A hypothetical planet is depicted here moving through the habitable zone and then further out into a long, cold winter.

A tiger’s eyes glow during the night on the same foot paths and roads humans use during the day to collect wood and grasses.

An example of bioluminescence: light emitted from a deep sea brittle star

This view of the lower front and underbelly areas of NASA's Mars rover Curiosity combines nine images taken by the rover's Mars Hand Lens Imager (MAHLI) during the 34th Martian day, or sol, of Curiosity's work on Mars (Sept. 9, 2012).

Laser light is emitted from the end of a cadmium sulfide nanowire.

Coal plants like this one in West Chicago release mercury into the atmosphere which can end up in the water supply. This plant, the Crawford Generating Station, is among the last coal-fired plants to shut down in the city, and this move could help bring the already low mercury content in nearby Lake Michigan down even further.

Different Iranian industries, including the country's auto-manufacturing companies, are making an increasing use of nanotechnology in their products.

New Media Explosion Makes DNC Most Open Convention.