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Dan Sinclair, 92, of Mentor, passed away at home on March 12, 2024. He was born in Scotland on October 3, 1931, to the late Daniel and Mary Sinclair.

Dan came to America in 1957 after earning his PhD in astrophysics at the University of Glasgow. He taught at the University of Michigan in Ann Arbor and came to Northeast Ohio to lead an experiment related to the Grand Unified Theory. Although the project never detected proton decay, he found more than he’d come for in Northeast Ohio. His experiment not only detected neutrinos emitted from a supernova – a very rare event – but also, he discovered his beloved wife, Barbra.

After retirement, he taught himself woodworking and made beautiful pieces that his family will treasure. Dan was an avid walker and lived a vibrant life until his last days. He loved the beach whether it be at Girvan, as a child, or walking along Headlands Beach with family, or watching sunsets at Watervale along Lake Michigan in his later years.

Survivors include his wife of 38 years, Barbra Sinclair; children, Jan (Dann) Sinclair-Phillips, Daniel Sinclair, Gail Hayes, Andrew Sinclair, Deidre (Jason) Pyatt, Debbie Narramore, and Andrea (Keith) Lawrence; grandchildren, Gordon (Cheyenne) Sinclair, Chet Phillips, Ann (Carl) Sinclair-Nelson, Ben Ganger, Holly Ganger, Jordyn Maldonado, Jade Maldonado, Jenna Pyatt, Brooke Eveland, Joseph Eveland, Cameron Lawrence and Claire Lawrence; great-grandson, Britt Nelson; brother, William (Benita) Sinclair and nieces, nephews and many other loving family members and friends.