[Bert Sierra]

Definitely off topic, but I believe you’re referring to the Mars Climate Orbiter which “crashed” into Mars as a result of Lockheed Martin using one set of metric units, whereas everyone else was using SI units in their specs and calculations.

However, to give you a more detailed answer:

1) I don‘t know if you can say it truly crashed, per se, into Mars, since really it was shredded by atmospheric friction some 57km from the surface. However, it did certainly crash into Mars’ atmosphere.

2) I would also argue that *every* mars surface probe has ‘crashed’ into Mars in some form or another. To varying degrees, most survived.