Out of all the different types of silk, mulberry silk is the highest quality. It’s made from silkworms who only eat leaves from the mulberry tree. Not to mention, it’s also the most durable and softest kind– perfect for something that gets a lot of use like a pillowcase.

Fact

Because of lower gravity, a person who weighs 220 lbs on Earth would weigh 84 lbs on Mars.

When sending droids to the surface of Mars, this is something scientists plan for, being able to load the droid up with more equipment and build it from more robust materials.