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Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store.

How the Geography of the US is Weirder Than You Think

Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store.

Search for the LION KING

Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store.

90 in 90 England vs. Panama 2018 FIFA World Cup™ Highlights

Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store.

I Built A Working Car Using Only LEGOS

Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store.

Marshmello x DuckTales - FLY (Music Video)

Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store.

Lemon powered Supercar- WORLD'S LARGEST Lemon Battery

Dr. Jeffrey E. Terrell, director of the Michigan Sinus Center, demonstrates how to build an air purifier with a HEPA filter for about $25 with parts from your local hardware store.