Name: Past Perfect Prediction: For Real
Uploaded: 2017-10-26T18:53:37.000Z
Duration: 3 min 31 s
Description: Harry develops a week-long sneezing fit and discovers he has a cat allergy.

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The JPB Foundation (The Freedom Together Foundation)

The JPB Foundation

Overdeck Family Foundation

National Science Foundation

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Harry develops a week-long sneezing fit and when he tracks and studies data about when and where he sneezes, he discovers he has a cat allergy.

Harry develops a week-long sneezing fit and discovers he has a cat allergy.