Boris

“Space is about 100 kilometers away. That’s far away—I wouldn’t want to climb a ladder to get there—but it isn’t that far away. If you’re in Sacramento, Seattle, Canberra, Kolkata, Hyderabad, Phnom Penh, Cairo, Beijing, central Japan, central Sri Lanka, or Portland, space is closer than the sea.”
― Randall Munroe, What If? 10th Anniversary Edition: Serious Scientific Answers to Absurd Hypothetical Questions

“X-Plane tells us that flight on Mars is difficult, but not impossible. NASA knows this, and has considered surveying Mars by airplane. The tricky thing is that with so little atmosphere, to get any lift, you have to go fast.”
― Randall Munroe, What If? 10th Anniversary Edition: Serious Scientific Answers to Absurd Hypothetical Questions