I suppose that every time there is difficulty. I remember about Space Mountain: It took us ten years before we found the technology that would allow such a ride. And during these ten years, I had a model that I kept, waiting for the technology we needed. ↗
When running to fill a time quota, however, the reverse happens. You can't make that time pass any faster by rushing, so you settle into a pace that feels right to you at the moment. Each minute above a quota is a little victory. ↗
The Next Generation Space Telescope, which will be located much further away from the Earth than the Hubble Space Telescope presently is, will also explore the infrared part of the spectrum. ↗
The one thing a lifetime in the newspaper business teaches you is pace - you spend all your time trying to make sure that the reader's going to finish what you're writing. ↗