April 2025Today JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember2013201420152016201720182019202020212022202320242025 Sun Sunday Mon Monday Tue Tuesday Wed Wednesday Thu Thursday Fri Friday Sat Saturday 30 31 1 2 3 4 5 6 7 From Formations to Foundations: The Geology of Bridge Construction 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Paleozoic Stromatolites in the Midwest 22 23 24 25 26 27 28 29 30 1 2 3