Template:Selected anniversaries/June 29
1818: Astronomer, academic, and Jesuit Angelo Secchi born. Secchi will be a pioneer of astronomical spectroscopy, and one of the first scientists to state authoritatively that the Sun is a star.
1868: Astronomer and journalist George Ellery Hale born. He will discover magnetic fields in sunspots, and be leader or key figure in the planning or construction of several world-leading telescopes.
1895: Biologist Thomas Henry Huxley dies. He is known as "Darwin's Bulldog" for his advocacy of Charles Darwin's theory of evolution.
1896: Physicist Boris Yakovlevich Podolsky born. He will work with Albert Einstein and Nathan Rosen on entangled wave functions and the EPR paradox.
2010: Chemist Marc Julia dies. Julia (along with his colleague Jean-Marc Paris) discovered the Julia olefination reaction in 1973.