Nasa has successfully launched a probe which will explore the mysterious insides of Mars.
The InSight lander launched in the early hours of Saturday from Vandenberg Air Force Base in California, and is the first interplanetary mission to take off from the West Coast of the US.
It will take more than six months for the lander to reach Mars and start its unprecedented geologic excavations.
The probe will measure the planet's "vital signs" in a bid to help scientists discover how rocky planets such as Mars and Earth formed.
Instruments on the lander will dig deeper into Mars than ever before – nearly 16 feet – to take the planet’s temperature.
It will also attempt to make the first measurements of Marsquakes - quakes that occur on Mars every million years - using a seismometer placed directly on the Martian surface.
It is hoped that the tremors will reveal how the underground rock is layered - data that can be compared with Earth's to shed further light on the formation of the planets 4.6 billion years ago.