Heidenheim vs. 3rd 2. Bundesliga, 2 p.m. Cologne vs. Kaiserslautern, 9:30 a.m. Darmstadt vs. SSV Jahn Regensburg, 9:30 a.m. Karlsruher SC vs. SC Paderborn, 9:30 a.m.

RB Leipzig vs. Stuttgart, 9:30 a.m. Dortmund vs. Holstein Kiel, 9:30 a.m. Hoffenheim vs. Bayern, 9:30 a.m. Heidenheim vs. Bremen, 9:30 a.m. Freiburg vs. Eintracht, 9:30 a.m.

Ants that sipped a sugar drop dipped in caffeine found it again more quickly on later trips, leaving a stronger scent trail ...