Jim Hakala is hitting the road Friday with bins of captivating remnants of the ancient past. Among other things, he鈥檚 got fossilized fern, leaves, shark teeth, dinosaur bone, fish, petrified wood and a trilobite. This time, he鈥檚 targeting fourth grade classrooms in mostly northeastern Colorado with 12 of his 鈥渇ossil kits,鈥 courtesy of the 麻豆免费版下载Museum of Natural History, along with a standards-based curriculum for use by teachers.