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There are two possible answers to this, so I will give both. The longest total combined time over more than one flight is Sergei Vasilyevich Avdeyev. He spent a total of 747.6 days over three flights. The longest time on a single flight was by Dr. Valeri Vladimorovich Polyakov. The record was 437.7 days aboard Soyuz TM-18. See the related link for more information.
Shannon Lucid spent 188 days in space in 1996.
I once spent like 8 hours in the tub
4hours
The problem is that money spent on the poor doesn't solve the problem at all.
The record for the longest time spent on the Billboard Hot 100 is held by "Radioactive" by Imagine Dragons, which spent 87 weeks on the chart.
June Middleton
The record for the longest time spent on a hammock is 40 hours and 37 minutes, achieved by Deanne Bednar in November 2016. She spent the time in a hammock suspended above the ground without sleep.
a
The longest time spent reading a book continuously is 113 hours and 15 minutes, achieved by Deepak Sharma Bajagain from Nepal in 2018.
20 years
Four weeks non stop