'(Cheryl of the Clue Crew at the Eli Whitney Museum in New Haven, Connecticut)  In the 1940s, Dr. William Sewell created an artificial one of these, using parts from an erector set'
an artificial heart
SCIENCE & TECHNOLOGY: In the 1940s, Dr. William Sewell created an artificial one of these, using parts from an erector set
In the 1940s, Dr. William Sewell created an artificial one of these, using parts from an erector set
In the 1940s, Dr. William Sewell created an artificial one of these, using parts from an erector set
SCIENCE & TECHNOLOGY
an artificial heart
SCIENCE & TECHNOLOGY