the International Space Station was home to six astronauts

and one Robonaut.

Not to be mistaken for a spaghetti-legged member

of Daft Punk, NASA's Robonaut 2 was actually the first

humanoid robot ever sent to space.

Clip: And are you sure this guy isn't related to Hal?

Narrator: It spent about four years on the space station

before it had a hardwire malfunction in 2015,

and then another three years lying broken and creepy

until NASA retrieved it in 2018.

After a round of repairs, it's set to return

to the space station later this year,

but it might not be alone,

NASA has a full slate of other wonderfully weird robots

it wants to send to space in the near future,

and luckily none of the rest participated in a beefcake

photo shoot no one asked for.

This is Dragonfly. The first multirotor vehicle from NASA

that will ever set foot, er, ski, on another planet.

Part robot, part space drone, Dragonfly will make

the 759,000-mile eight-year journey to Titan,

Saturn's largest moon.

Rivers, lakes, and seas across its surface are filled

with not water, but liquid methane and ethane.

Titan is the only place in the solar system besides Earth

with standing bodies of liquid. But there are places

along the surface that contain evidence of past liquid water

and the complex molecules key to producing life,

that's what Dragonfly is after.

During a 2.5 year mission, the rotorcraft will land

in the Shangri-La dune fields and make its way

to the Selk impact crater where scientists believe

the ingredients for the recipe for life once existed.

The coolest part? Titan has the capacity for life

as we know it, and life as we don't.

The evidence of water shows habitable conditions

for life-forms similar to those on Earth,

but the liquid methane and ethane could also be home

to life, just nothing we've ever seen before.

Dragonfly will focus on both in order to better understand

the origin of life in the universe.

It's set to launch in 2026 but won't arrive until 2034.

LEMUR is more like the mother of robots than its own thing,

but we're counting it anyway.

LEMUR stands for Limbed Excursion Mechanical Utility Robot,

it's got four limbs and was originally conceived

as a repair robot for the International Space Station.

It uses 16 fingers covered in hundreds of tiny fishhooks,

plus a sprinkle of artificial intelligence

to scale walls and avoid obstacles.

The original project ended in 2019,

but technology from LEMUR is being used in other robots

that still have the potential for space travel.

The Ice Worm could be the name of a terrible superhero,

but in this case it's a little squiggly robot.

It's derived from a single LEMUR limb and it moves

by scrunching and un-scrunching, just like an inchworm.

It's part of a family of projects in development

to explore Saturn's and Jupiter's icy moons.

The worm drills into the ice, end over end in order

to climb or stabilize itself while collecting samples.

It also inherited its mama's AI, which helps it navigate

by learning from past slipups.

Another LEMUR kid is the RoboSimian.

Originally designed as a disaster-relief robot,

this humanoid bot has the same four limbs as LEMUR,

but its feet are a little different.

Instead of grippy feet, the robot, nicknamed King Louie,

has wheels made with piano wire that help it roll

over uneven ground.

That's especially helpful in icy environments

like Saturn's moon Enceladus, which is what it's being

developed for now.

RoboSimian can walk, crawl, inch, and even slide

on its belly like a penguin. All to meet the challenges

presented by silty, breakable ground.

Some micro-climbers use LEMUR's fishhook technology

to cling to rough surfaces; others use gecko-like adhesive

to climb smooth walls.

All of them are pocket-sized vehicles strong enough

to survive 9-foot drops.

The gecko-inspired tech relies on van der Waals forces,

which are basically what happens when you stick a balloon

to your head with static electricity,

but on a molecular level.

NASA hopes to use these little guys to repair spacecraft

or explore hard-to-reach spots on the moon,

or Mars, or anywhere really.

Arguably the most famous robot on its way to Mars

is the Mars 2020 Rover.

It's about the size of a car: 10 feet long, 7 feet tall,

and 2,314 pounds of pure robot.

It's based on Curiosity, the NASA rover that landed

on Mars in 2012.

Relying on a proven system cuts down on costs and risks.

The new rover will continue to search for past and present

habitable conditions and signs of life.

But it's bringing to the table a new drill

that can bore holes in the surface and store the soil

and rock samples for later use.

Potentially a transport from Mars back to Earth

so they can be studied in labs,

but the rover won't be roving all alone.

Inside the Mars Rover will be a little MOXIE,

or the Mars Oxygen In-Situ Resource Utilization Experiment.

Its job is to prove it can make oxygen on Mars

for fuel and breathing - like a happy little robot plant.

Mars' atmosphere is made up of about 96% carbon dioxide,

no good for humans.

This car-battery-sized version of MOXIE will only be able

to produce about 10 grams of oxygen per hour.

Future oxygen generators will need to be about 100 times

larger for manned missions.

Introducing the Mars Chopper.

The small, solar-powered helicopter will, fingers crossed,

be the first in history to prove heavier-than-air vehicles

can fly on other planets, and that's basically

its sole purpose.

Just like MOXIE, it will act as a proof of concept

for future missions.

The challenge is that Mars' atmosphere has 1% the density

of Earth's, making it nearly impossible

for helicopters to fly at all.

So far it's passed a number of important tests

that give scientists hope that they'll be able

to defy the laws of physics.

But even if it can't fly, the chopper will basically

be the parrot to the Mars Rover's pirate.

Engineers are developing grippers that will allow the copter

to cling to cliffsides,

a lot like a bird perches on a branch,

and surprise, it's another LEMUR baby.

Its feet use the same fishhook technology

as the four-limbed bot.

There's one more robot already up in space

that needs to "bee" included.

It's called Astrobee, and I think that's reason enough

for why we have to mention them.

There are three Astrobees:

Honey, Queen, and Bumble, obviously.

Bumble and Honey shot up to the Space Station in April 2019,

and Queen followed regally in July.

The free-floating cubes were designed

to alleviate some of the more routine tasks

that astronauts complete daily,

like taking inventory or moving cargo.

But they'll also be competing

with Robonaut 2 for the title

of Weirdest Robot in the International Space Station.