SHELDON: Hey Arthur - you wanna go to Japan with me? ARTHUR: Japan?
SHELDON: Yeah! I'm going to meet Kazufumi Goto. He's the biologist trying to bring back the wooly mammoth! ARTHUR
ARTHUR: Bring back the mammoth? What kind of doofus-y GUY SCIENCE is that? SHELDON
ARTHUR: You'd never hear a woman say "Hey - Susan! Becky! Whatcha doing all next year? Wanna resurrect a giant ice-age beast?" ...It's such a guy thing to do. SHELDON: It's not a guy thing! It's science!
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Scientist: ...And we're building him a shoulder-fired laser! SHELDON: Ok. It's a guy thing. ARTHUR