Think about all the innovations you've learned about in this lesson. it is time to start thinking like a cultural historian. imagine that you are preparing a time capsule of items that represent 20th century scientific achievements. the people who dig up your time capsule will be unfamiliar with the importance of these innovations because they are living in a world made possible by innovations developed well after you. your job is to prepare an explanation of 20th century science and innovation for the time capsule. step 1: choose five advancements in 20th century science that you think are most important. step 2: select an image to represent each of the advancements (five images). step 3: order the advancements you selected from most important to least important. then, for each advancement, write two to three sentences explaining why the advancement is important. step 4: create a digital time capsule featuring the five advancements you selected in order from most to least important. on one final slide, write one paragraph explaining why you ordered the advancements the way you did. your time capsule should include one slide for each scientific advancement that includes an image and two to three sentences explaining why the advancement is important one final slide that includes a paragraph explaining why you ordered the advancements the way you did