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I added a video to a @YouTube playlist https://t.co/Hpfzf03ivm Winding of DNA on Histones.

I liked a @YouTube video https://t.co/Hpfzf03ivm Winding of DNA on Histones.

Winding of DNA on Histones.: https://t.co/Hpfzf03ivm via @YouTube

NASA Astronaut Bresnik and Crewmates Return to Earth From Space Station via NASA https://t.co/spz0wscG0g

DNA coiling...: https://t.co/P5vb38PEtA via @YouTube

I added a video to a @YouTube playlist https://t.co/4qw8ZPukka 32-bit vs 64-bit Computers & Phones as Fast As Possible

I liked a @YouTube video https://t.co/4qw8ZPukka 32-bit vs 64-bit Computers & Phones as Fast As Possible

"Marijuana and Vaping Are More Popular Than Cigarettes Among Teenagers" https://t.co/a28vLFcmPd

"Uber Under Criminal Investigation, Justice Dept. Confirms in Letter to Court" https://t.co/VggVA91tvO

"The Biggest Tech Failures and Successes of 2017" https://t.co/h5v6knhvss