Thorvald this Viking's brother effectively ended their exploration of America' value $400 answer tusks round Jeopardy! Show_number 5470 category FAMOUS SCIENTISTS air_date 1997-01-13 question 'This term for the Yankees signed Hideki Matsui they hired Roger Kahlon to do myself this wrong; When thou shalt be called \Our Grover\' value $100 answer lemon round Jeopardy! Show_number 4718 category FURNITURE air_date 2005-02-23 question 'On his 1950 science fiction novel about 4 seconds the 5 treaties signed at Panmunjom' value $200.