Way to go NASA. "US space agency Nasa has landed a new robot on Mars after a dramatic seven-minute plunge to the surface of the Red Planet."

Scientists understand very well how Earth's interior is structured, and they have some good models to describe the initiation of this architecture at the Solar System's birth more than 4.5 billion years ago. But Earth is one data point and Mars will give researchers a different perspective on how a rocky planet can be assembled and evolve through time.

InSight chief scientist Bruce Banerdt said: "The small details in how planets evolve are what we think make the difference between a place like Earth where you can go on vacation and get a tan, and a place like Venus where you'll burn in seconds or a place like Mars where you'll freeze to death."

Some interesting science at BBC News:

Mars: Nasa lands InSight robot to study planet's interior