Freckles Are Caused by a Concentration of Which Pigment?
Briefly

Each weekday, Ray Hamel challenges players with unique quiz questions on specific topics, allowing them to compare scores with average contestants and compete against friends.
Slate Plus members can access a leaderboard after quizzes, giving them a chance to see how they rank compared to other participants in the daily challenges.
The quizzes cover a variety of topics, starting with science today, and aim to engage participants in testing their knowledge and wits every day.
To enhance the quiz experience, participants may need to enable cookies in their browsers for optimal functionality.
Read at Slate Magazine
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