A complete 4K camera and 3-axis gimbal system come integrated with the Phantom 3 Professional edition quadcopter from DJI.
Standing vs. Lying Down. It's a common misconception that cows don't lie down to rest and that they sleep standing up, just like horses do much of the time. In fact, cows actually lie down for up to 14 hours per day, standing up every few hours, stretching and then lying back down again.
You need about 10 to 11 hours of sleep a night. Getting enough sleep every night helps your body grow and have energy. RESULTS: Whoa! It looks like you learned a lot about animals and how they sleep. Take this quiz again and see if you can score higher.