Visible imagery from NASA's Aqua satellite showed Tropical Storm Lee as a weak swirl of clouds around its center with most of its clouds and thunderstorms pushed east of its center.

On Sept. 18 at 12:25 p.m. EDT (1625 UTC) the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Aqua satellite provided an visible image of Tropical Depression Lee. Those thunderstorms east of the center developed during the morning hours and were pushed east of the center from strong westerly to northwesterly vertical wind shear.

NASA and NOAA satellites have provided data on Maria as it strengthened into a major Hurricane headed toward the Leeward Islands. NASA's Aqua satellite provided an infrared look at Maria that showed cooling cloud top temperatures and NOAA's GOES satellite provided an animation of imagery that showed the storm developing and strengthening. The GPM satellite found "Hot" towering clouds that indicated strengthening was occurring before Maria became a major hurricane.

Warnings and Watches on Sept. 18

New research published in The Journal of Neuroscience identifies a motor pathway between the forebrain and brainstem that works like a dimmer switch to regulate swimming speed in the sea lamprey - a primitive, jawless fish with an eel-like body studied by neuroscientists as a model of the vertebrate nervous system. Dysfunction of this pathway, which is likely present in mammals potentially including humans, may contribute to the symptoms of movement disorders such as Parkinson's disease.

CORVALLIS, Ore. -- Animals in the Goldilocks zone -- neither too big, nor too small, but just the right size -- face a lower risk of extinction than do those on both ends of the scale, according to an extensive global analysis.

Reporting today in the Proceedings of the National Academy of Sciences, researchers who determined body masses for thousands of vertebrate animal species showed that the largest and smallest species face a greater risk of extinction than do mid-sized animals.

Over the course of three days, Otis transitioned from a struggling tropical depression into a powerful hurricane in the Eastern Pacific Ocean. NASA-NOAA's Suomi NPP satellite captured an image of Hurricane Otis, showing a pinhole eye.

NASA-NOAA's Suomi NPP satellite passed over Tropical Storm Norma when it was just 145 miles south-southwest of Cabo San Lucas, Mexico, close enough to create rough ocean conditions and bring rain to Baja California.

RICHMOND, Va. (Sept. 18, 2017) -- Virginia Commonwealth University researchers have achieved a feat that is a first in the fields of physics and chemistry -- one that could have wide-ranging applications.

In the colorful world in which we live, colors are significant for not only aesthetics and pleasure, but also for communication, signaling, and security. Colors are produced through either absorption of light by molecules -- pigmentary colors -- or scattering of light by nanostructures -- structural colors.

NASA's Terra satellite captured an image of Typhoon Doksuri as it made landfall in eastern Vietnam in the Ha Tinh province.

The Moderate Resolution Imaging Spectroradiometer or MODIS instrument that flies aboard NASA's Aqua satellite passed over Typhoon Doksuri as it was making landfall in northeastern Vietnam on Sept. 14, 2017. The image showed Doksuri's eastern quadrant over Vietnam, Laos, and eastern Thailand. The southernmost bands of the storm were over northern Cambodia. The eastern quadrant extended into the Gulf of Tonkin.

The idea of being bitten by a nearly toothless modern frog or salamander sounds laughable, but their ancient ancestors had a full array of teeth, large fangs and thousands of tiny hook-like structures called denticles on the roofs of their mouths that would snare prey, according to new research by paleontologists at the University of Toronto Mississauga (UTM).