While he did not ask Lewis and Clark to look for dinosaurs, he did ask them to examine the remains of any animal they found to be rare or extinct. In other words, any fossils and/or bones. Here are Jefferson's words:
"Other objects worthy of notice will be the soil & face of the country, it's growth & vegetable productions, especially those not of the US; the animals of the country generally & especially those not known in the US; the remains & accounts of any which may be deemed rare or extinct..."
Thomas Jefferson hired Lewis and Clark.
sacagawea,lewis,clark,thomas jefferson
Thomas Jefferson
no.
Lewis
Lewis and Clark were sent by Thomas Jefferson to explore the west.
Thomas Jefferson expected Lewis and Clark to find Mammoths.
Thomas Jefferson
Thomas Jefferson
Thomas Jefferson
Lewis & Clark
Thomas Jefferson.