TIL That obsidian knives are so sharp they cut on a cellular level. Due to this, when used in the medical field, incisions made with the blade heal faster with less scarring. :
Take (Temptation, #2) by Ella Frank | Goodreads
you could cut the atmosphere/air/tension with a knife | meaning of you could cut the atmosphere/air/tension with a knife in Longman Dictionary of Contemporary English | LDOCE
you could cut the atmosphere/air/tension with a knife | meaning of you could cut the atmosphere/air/tension with a knife in Longman Dictionary of Contemporary English | LDOCE