Susanna Post, the 2021 Arkansas Teacher of the Year, is getting ready for a model sailboat race. Her sailboat has triangular-shaped sails. Can you help her name and classify triangles? Rise and Shine ...

NASA has reached a significant technological milestone with progress on an experimental form of spacecraft propulsion which utilizes solar radiation. The space agency successfully deployed one of four ...

About a year from now, if all goes well, a box about the size of a loaf of bread will pop out of a rocket some 500 miles above Earth. There in the vacuum it will unfurl four triangular sails.

A strange new type of boat has been cruising up and down Newport Bay, drawing double-takes from salty, old-time seafarers as well as those new to sailing. The vessel drawing all the stares is the ...

Artist's concept of the Planetary Society's LightSail spacecraft in orbit. A solar sail mission funded entirely by private citizens will launch to Earth orbit just a few months from now. The nonprofit ...