Water purification system(水净化系统)

In the 1960s, NASA created a way to purify astronauts' drinking water by adding silver ions(离子) into the spacecraft's water supply system. This technology is now widely used to help keep the water in swimming pools clean.

Carmera phones

In the 1990s, a team at the Jet Propulsion Laboratory(JPL) worked to create cameras

small enough to fit on spacecrafts. Now lots of cameras use this technology, which makes camera phones possible.

Memory foarm(记忆海绵)

It was developed by NASA in the'1970s to help make pilots' seats more comfortable.

Today memory foam is used to make more comfortable beds, chairs, sofas and even shoes.

Freeze-dried food(冻干食品)

NASA did a lot of research on space food. One important thing was that they found a

way of keeping food—freeze-drying. It keeps 98% of the nutrients(营养物) of the food, but the food weighs about 80% less. Now freeze-dried food is often used by campers and is included in emergency kits(应急包).