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In the great green labThere was a laserAnd a lab notebook And a picture of Einstein with a stern look It's been a long day at the lab for this scientist. Now it's time to say good night!Goodnight laserGoodnight notebookGoodnight picture of Einstein with a stern lookWhile poking fun at the clutter and chaos of lab life, scientists of all ages will appreciate ending their day with this sweet parody. They'll be rested and ready to return to the world of research in the morning!