If you spent Thanksgiving slaving over a hot stove, you might be glad to know that researchers are developing some robotic kitchen assistants that could someday do the hard work for you.

Here is a roundup of robots designed to help humans with food preparation. No turkey-prepping robots (yet), but these bots can prepare sushi, pancakes, even ramen noodles.

At this year's FOOMA International Food Machinery and Technology Exhibition in Tokyo, a "sushi robot" showed off its food-handling skills, gently grasping raw fish without squishing it. The robot is essentially an industrial robotic arm with a silicone hand attached to the end.

At the same conference, a Japanese-pancake-flipping robot with voice-recognition was able to take orders and use its 15 joints brush oil, knead dough, add spices, flip the pancakes and serve them.

In a noodle restaurant in Japan, a robotic chef can prepare and serve 80 bowls of ramen noodles on a busy day.

This robotic system stacks 400 pancakes per minute.

A prototype solar-powered airplane completed several important tests last Thursday and Friday.

Solar Impulse's HB-SIA, which was finished this past summer, taxied down a runway using power from the 11,000 solar cells covering its wings and did a series of acceleration and braking tests. The next test will be revving up the plane to its 35km/hour take-off speed.

Founder of Solar Impulse, Bertrand Piccard, a former astronaut and the first man to circle the world nonstop in a balloon, hopes to perform the same feet in a solar-powered plane derived from on the HB-SIA design. Solar Impulse aims to test the prototype in flight next year and to achieve a 36-hour flight without fuel shortly after that. Results from these tests will be used to build a solar-powered plane to will attempt a transcontinental flight sometime after 2012.

A number of solar-powered aircraft exist already, such NASA's Helios, the Solar Riser glider or the Sunseeker which flew across the US in 1990 using a mix of solar power and gliding.

The Solar Impulse prototype is made of lightweight materials, weighing only 3,500 pounds and it has a wingspan of 210 feet. It is intended to fly at only 28 miles per hour to keep energy consumption low. It will store solar energy for night flight.

The video below shows computer simulations of Solar Impulse's plane, and the real thing on the runway.

In this video, from the American Chemical Society, a chemist dressed in a pilgrim costume and a lab coat explains how those pop-up turkey timers work--by cutting one open, and applying the ideal gas laws, of course.