| ▲ | johnisgood 3 hours ago | |
Hmm, can you think of anything that we could do decades ago but cannot do it now, today? | ||
| ▲ | an hour ago | parent | next [-] | |
| [deleted] | ||
| ▲ | c0_0p_ 2 hours ago | parent | prev [-] | |
Fly supersonic commercially is the only thing I can think of | ||