"There's a seal!" - AMY BRIGGS, Do Shark Stories Help Sharks?, Overheard at National Geographic #OverheardNatGeo #shark #InternationalSealDay #AmyBriggs

"So Darwinists would say, our repulsion to them is actually a pretty useful adaptation." - VAUGHN WALLACE, Rats vs Humans: A Love Story, Overheard at National Geographic #OverheardNatGeo #DarwinDay #VaughnWallace

"Edison was the inventor of the wax cylinder." - BRIAN GUTIERREZ, Ancient Orchestra, Overheard at National Geographic #OverheardNatGeo #ThomasEdison #HappyBirthdayThomasEdison #BrianGutierrez

"He's been called to testify in front of Congress about the potential environmental impact of new laws." - PETER GWIN, The Frozen Zoo, Overheard at National Geographic #OverheardNatGeo #PeterGwin

"That's what it's saying." - BETTINA JOY DE GUZMAN, Ancient Orchestra, Overheard at National Geographic #OverheardNatGeo #BettinaJoyDeGuzman

"I have shoes on on the beach, which is, like, not allowed." - AMY BRIGGS, Do Shark Stories Help Sharks?, Overheard at National Geographic #OverheardNatGeo #shark #NationalBeachDay #AmyBriggs

"In case you're worried, the baby giraffe is doing fine." - AMY BRIGGS, Giraffes on a Boat, Overheard at National Geographic #OverheardNatGeo #WorldGiraffeDay #AmyBriggs

"He's a National Geographic Explorer." - AMY BRIGGS, Giraffes on a Boat, Overheard at National Geographic #OverheardNatGeo #NationalGeographic

"Don't start a farm with a chef!" - JOHN CHESTER, Farming for the Planet, Overheard at National Geographic #OverheardNatGeo #InternationalChefsDay #JohnChester

"I grew up feeling American." - DIANA MARKOSIAN, When Family Secrets (And Soap Operas) Fuel Creativity, Overheard at National Geographic #OverheardNatGeo #DianaMarkosian