Great post!

Evolution of antibiotic resistance is indeed fairly easy, but how about evolving something visibly different? Evolution of simple multicellularity from a unicellular ancestor is easier than you might think: http://www.snowflakeyeastlab.com/

If we can solve the earth-orbits-the-sun problem, we don't need to measure the parallax of stars accurately to show that they're really far away, which seems like an important scientific truth.