NASA has trialled an engine that would take us to Mars in 10 weeks
sciencealert.com
sciencealert.com
This drive has been talked about ad nauseum and the conclusion is that while there might be something interesting going on, and the results may have been potentially replicated, there's a lot of work that has to go into this before we should even consider that something aside from calculation error is happening.
And saying that NASA is trialing this is not correct. They gave a scientist some money and some space to play around with an idea. They do that from time to time.