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Clue Answer Source
Heavy hydrogen, e.g ISOTOPE Universal - Feb 24 2016
Heavy hydrogen, e.g. ISOTOPE Thinks.com - Apr 22 2010
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Heavy dull sound caused by a heavy object THUD Irish Times (Simplex) - Aug 26 2022
X-ray discoverer ROENTGEN Newsday.com - Dec 10 2021
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Discoverer's cry HEREITIS Eugene Sheffer - King Feature Syndicate - Jun 24 2021
Discoverer's cry OHO Family Time - Jun 13 2021
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Discoverer's cry AHA Universal - Nov 21 2018
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Discoverer's cry LOOKWHATIFOUND New York Times - Mar 13 2016
X-ray discoverer RONTGEN USA Today - Aug 26 2014
Discoverer's cry EUREKA Universal - Mar 2 2010
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Discoverer INVENTOR The Times - Concise - Times2 Concise 2735 - August 17, 2002
Discoverer's call OHO Eugene Sheffer - King Feature Syndicate - Jan 9 2025
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Insulin co-discoverer BEST Canadiana - Jul 11 2022
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Discoverer of x-rays ROENTGEN Newsday.com - May 5 2022
Radium discoverer CURIE New York Times - Dec 14 2021
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Discoverer’s cry OHO Wall Street Journal - Aug 17 2021 - Cleared for Takeoff
Discoverer of dynamite NOBEL The Times - Concise - Times Concise No 8580
New Zealand discoverer TASMAN Thomas Joseph - King Feature Syndicate - Jul 21 2020
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Discoverer of the Mississippi DESOTO Newsday.com - May 24 2020
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Newfoundland discoverer CABOT Canadiana - Apr 20 2020