19

Biologists from Harvard tested the animals to find how stress affected them. Scientists found that stress turns hair grey in ………………… . The scientists injected them with an ingredient taken from chili peppers. Their hair quickly turned white.

MOUSE

20

People………………… that stress turns hair grey for centuries. France’s Queen Marie Antoinette’s hair supposedly turned white before death. More recently, the hair of presidents have quickly lost colour.

BELIEVE

21

The researcher says the damage is permanent. They ………………… a way to reverse the loss of the colour during the test last year.

NOT FIND

22

Cooking has reached new heights. Astronauts on the International Space Station made the first space-baked cookies. The cookies are the very first kind of food to be baked in space from raw ingredients. Baking the cookies was not as easy as the astronauts ………………… it would be. The first cookie came out undercooked.

THINK

23

Space food………………… on Earth. It is pre-packaged and then heated on the space station.

MAKE

24

Astronauts will enjoy………………… freshly baked food. It will be a nice reminder of home. They said this would be important for astronauts going to the moon or on the long journey to Mars.

EAT