Learn and GROW...

Why Do We Sleep ?
Hunger and Eating; Sleepiness and Sleep
As with eating well, good sleep is a staple of optimal health.

Eye
Eyes are organs of the visual system. They provide organisms vision, the ability to process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and convert it into electro-chemical impulses...

Aircraft
An aircraft is a machine that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using thedynamic lift of an airfoil,[1] or in a few cases the downward thrust from jet engines.
The human activity that surrounds aircraft is called aviation. Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may beremotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria...

Rocket
A rocket (from Italian rocchetto "bobbin")[nb 1][1] is a missile, spacecraft, aircraft or other vehicle that obtains thrust from a rocket engine. Rocket engine exhaust is formed entirely from propellant carried within the rocket before use.[2] Rocket...