involved at this level of organization, micromanagement. ok. [applause] [captions copyright national cable satellite corp. 2015] [captioning performed by the national captioning institute, which is responsible for its caption content and accuracy. visit ncicap.org] hoover came to the white house as a trained geologist, successful in the private and public sectors. term, theo hoover's stock market crashed. first lady hoover volunteered her office for charity. amongeir first term ended growing public depression. ladies,"r on "first examining first ladies and their

influenzae on the presidency, sunday at 8:00 eastern on american history tv on c-span3. >> middle school and high school students, we are happy to announce the launch of c-span's 2016 documentary competition. we are excited about the theme, road to the white house. which issues do you want candidates to discuss? the competition is open to students grades six through 12. $100,000 inwarning cash prizes. work alone or in a group of up to three. provide a documentary with c-span programming and explore opinions other than your own. the $100,000 prize will be

shared between 150 students and 53 teachers. the grand prize goes to the best overall entry. the deadline is january 20, 2016. winners announced on march 9. you will find more information on our website, studentcam.org. this year, c-span is touring cities across the country, exploring american history. a look at our recent visit to grand junction, colorado. you're watching american history tv, all weekend, every weekend, on c-span3. >> we are currently at dinosaur hill. this is a spot that is part of the national conservation area managed by the bureau of land

management. it was settled in the 1880's. as people were settled, they were finding bones out of the morrison formation. the area is so rich. paleontologist a with no intention of coming to the grand valley. on a expedition to the basin, where people were looking for early dinosaurs. the leader of the academy of sciences in grand junction, sent him a letter. dr. bradley. he said, we have just been settled. all of the ranchers keep picking up giant bones. these are dinosaur bones. no one is here to look at the bones. would you consider coming here? map, saw theree

was a railway system for getting supplies. so he decided to come here. the first skeleton he found was on the base of the colorado a sauropod.ument, when of the most common in the formation. he decided to scour the area for bones. hill,miles east at riggs his assistant came across the bones of an enormous animal. we now know it as brachial hiosaurus.brac it was the largest dinosaur known and discovered in the valley. then you had more people coming in. happened withush

the accounting movement. they started discovering all these small areas. that is when the science hit the fan. everybody wanted to come to grand junction for research. now, we are entering a new phase of building our collections. we are partnered with colorado university. not only are we acting as the museum and field agents, but we are involving students in the learning process of paleontology. digging bones out of the ground is only part of the story. the rest of the story takes place at the museum. you take the bones, clean them, and get ready for scientific study. at theinside the lab

dinosaur journey museum. all the loans we collect come into the museum to be clean up for display or research. bones. over 10,000 we have a really rich area that is dense with fossil loans from the jurassic period. we have beenrry working for 30 years. bones. pulled out 5000 prolific,quarry is as but we found fish, crocodiles, plants. 10,000 individual fossils in our collection. the very first fossil to get in western colorado is the maxilla, the

dominant tooth-bearing bone in the upper jaw. this would have been a allosaurus. this was discovered in the 1970's by lance erickson. skull we havehe is the lacrimal bone. and filledetely thin with structures. bones a mammal goal, the do not fuse. you typically find them in little pieces. the brain case.

condyle.he occipital this is the foramen magnum. here is the top of the skull. you are looking at the sides of the brain case. it is a little squished, but brain cases are the jewels we look for. you can tell where the cranial nerves are exiting, the different portions of the brain that are large. the most common dinosaurs in the grand valley are apatosaurus and of the mostone common predators in the jurassic. oodles of their teeth. they have serrations on both sides. think of a double steak knife

going through your porterhouse like butter. they are compressed along the outside edges of the skull, fatter at the front. we will occasionally find them with the roots. most of the teeth are broken at the root, meaning the animal shed teeth during feeding. they are not like humans with an adult set. you only get the teeth with roots when they fall out of the lower jaw. it is always exciting when you find a piece with a root. ullt means there may be a sk nearby. it may be pieces or intact. halfwayooking at a bone through being cleaned.

still not ready to have the other cycling. this was pulled out of the quar ry in july. it is the largest complete apatosaurus femur ever found. mammals have a ball and socket joint. dinosaurs do not have that. highly mobile in pl direction in that walking ain. to the side,ick which is why you hear that cracking sound when you break the drumstick of a turkey. all the way down is the head of the femur. it is six feet, seven inches

dreg, contender for the an the giant of the average apatosaurus. this animal, we have done size comparisons, it should have been about 90 feet long. not a new species, but a very large individual. not only is it a large individual, but you can see it -- has also got unusual markings. these little divots are not normally here. these are punctures from the toes of a predatory dinosaur. two, three one, a secondarks from finger of a three-fingered hand.

the most common in the morrison formation are the allosaurus. when we pull it out of the quarry, it is a large package of rock. 2800 pounds. backhoe toorrow a get this sucker out. it was scientifically important to put a limit on how they the big thecan get -- animals can get. there are certain things you can do in the field that you cannot do elsewhere. we are on site.

not only can we show you what is in then every day valley, we run a popular dinosaur dig program, where we take the general public out to try for themselves. having a museum here keeps fossil discoveries in the area and reinforces us as a cry to residents. >> find out where c-span's is going next online at www.c-span.org. you're watching american history tv on c-span3. in 1939, eastman kodak gave newly released kodachrome to the u.s. government. c-span visited the library of congress to meet beverly ban