457K views · 2.5K reactions | Take your favorite street car, and turn it into a race car. That's IMSA." Porsche presents the basics of endurance racing, like what we see at Sebring and Daytona. | NBC Sports | Facebook

1.6M views · 7.3K reactions | The University of Iowa is cataloging 4,000 tiny literary jewels. Miniature books -- all measuring three inches or smaller -- are an intricate art form that dates back centuries, but don’t try to read the text without your glasses on. | NBC Nightly News with Tom Llamas | Facebook