Best in 7 days
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Ships within 48 hours · Estimated delivery Jun 24 - Jun 29
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Description
Mapping the DarknessNathaniel Kleitman arrived in the US as a penniless teenager who could not speak a word of English. Within a decade, he was pioneering the first ever experiments about how we sleep, and why. He stayed up for 115 hours. He tried moving from a 24 hour day to a 48 hour one. As he became a national sensation, students hungered to join him. His protgs Eugene Aserinsky and William Dement uncovered the mysteries of our sleep cycles. Dements lab assistant,
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.3 ★★★★★
Based on 1174 reviews
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Product Reviews
★★★★★ 3
Fades easily
Size: X-Large, Color: Ralph Lauren Black
It starts fading after a few washes
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Reviewed in the United States on August 25, 2025
★★★★★ 5
Very expensive
Size: X-Large, Color: Ralph Lauren Navy.
Very nice shirt. Good quality
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Reviewed in the United States on March 18, 2025
★★★★★ 5
Comfy!
My husband loves this shirt. It’s soft, fits well, and is a nice color
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Reviewed in the United States on February 7, 2020
★★★★★ 5
Delivered on time
Gift for grandson and he is very pleased.
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Reviewed in the United States on December 25, 2023
★★★★★ 5
Five Stars
Great shirt I really liked it. The soft material makes it feel comfortable.
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Reviewed in the United States on August 8, 2017
