Not impressed. Considering Dr. Robert Zubrin's Mars Direct plan and later revised Mars Semi-Direct plan announced in the early 90s even with the space technolog

Not impressed. Considering Dr. Robert Zubrin's Mars Direct plan and later revised Mars Semi-Direct plan announced in the early 90s even with the space technologies back then. [1][2][3][4] [1]: https://www.nasa.gov/pdf/376589main_04%20-%20Mars%20Direct%20Power%20Point-7-30-09.pdf https://www.nasa.gov/pdf/376589main_04%20-%20Mars%20Direct%2... [2]: https://www.youtube.com/watch?v=L7ZDf5KZGAk https://www.youtube.com/watch?v=L7ZDf5KZGAk [3]: https://www.youtube.com/watch?v=tcTZvNLL0-w https://www.youtube.com/watch?v=tcTZvNLL0-w