HDYMI Credits/Feedback

Project Manager: Robin Materese
Writers*: Alex Boss, Mark Esser, Jonathan Griffin, Gabe Popkin
Editors: Ben P. Stein, Robin Materese
Art: Natasha Hanacek, Brandon Hayes
Video**: Jenny Wang, David Stewart
Web Design: Paul Hernandez
Copy Editing: Sarah Henderson
Science Consultants: Denis Bergeron, Tina Butcher, Johanna Camara, Steve Choquette, Tom Cleary, Regina Easley, Georgia Harris, Richard Harshman, Sam Ho, Carol Johnson, Vincent Lee, Jacki Murray, Wyatt Miller, Andrew Novick, Melissa Phillips, Karen Phinney, Mike Riley, Alix Rodowa, Stephan Schlamminger, Meghan Shilling, Aaron Urbas, Jason Waters, John Wright, Justin Zook 

*Writer Credits

Alex Boss

• How Do You Know Your Food’s Nutrition Label Is Accurate?
• How Do You Measure the Depth of the Ocean?
• How Do You Measure the Percentage of Alcohol in Beer, Wine and Other Beverages?
• How Do You Measure the Acidity (pH) of the Ocean?
• How Do You Measure the 'Heat' of a Pepper?
• How Do Companies Measure DNA to Discover Your Ancestry?
• How Do You Measure Cholesterol in Blood Tests?

Mark Esser

• How Do You Measure Your Location Using GPS?
• How Do You Know the Age of Fossils and Other Old Things?
• How Do Smoke Alarms Detect Fires?
• How Do You Measure the Thrust of a Rocket Engine?
• How Do You Test Body Armor?
• How Do You Measure a Second?
• How Do You Know If Grocery Store Scales Are Accurate?
• How Do You Measure Air Temperature Accurately?
• How Do You Ensure That a Tape Measure Is Accurate?
• How Do You Measure the Strength of Gravity?

Jonathan Griffin

• How Do You Detect Carbon Monoxide?​​​​

Gabe Popkin

• How Do You Measure the Age of a Tree?
• How Do You Measure Forever Chemicals?

** Video Credits

David Stewart

• Ballistics Testing at NIST

Jenny Wang

• What is PNT?