William Sanford Nye (born November 27, 1955),[3] popularly known as Bill Nye the Science Guy, is an American mechanical engineer, science communicator, and television presenter. 

He is best known as the host of the science television show Bill Nye the Science Guy (1993–1999), the Netflix show Bill Nye Saves the World (2017–2018), and for his many appearances in popular media as a science educator.

Aspiring to become the next Mr. Wizard, Nye successfully pitched the children's television program Bill Nye the Science Guy to Seattle's public television station, KCTS-TV. The show—which proudly proclaimed in its theme song that "science rules!"—ran from 1993 to 1998 in national TV syndication.

Nye continued to advocate for science, becoming the CEO of The Planetary Society. He has written two bestselling books on science: Undeniable: Evolution and the Science of Creation (2014) and Unstoppable: Harnessing Science to Change the World (2015)

The beloved TV scientist got schooled after posting a celebratory Juneteenth tweet that contained misinformation about the holiday, which marks the anniversary of Union Major General Gordon Granger and his troops arriving in Galveston, Texas, and informing residents of the Emancipation Proclamation—which had been issued two and a half years prior.

Nye posted a selfie on Sunday, June 19, 2022, with a copy of the Constitution, writing, "The United States we know today was built with the labor of enslaved Black Americans. The last were not freed (officially) until 19 June 1865. Let us celebrate— and never forget."

While most appreciated the sentiment behind Nye's post, they were still quick to point out inaccuracies to prevent further misunderstanding of the new federal holiday.

One of the many replies to Nye's tweet was from radio host George Wrighster III, who wrote, "Bill Nye is right about building America but slaves weren’t freed until Dec 1865 when 13th amendment was ratified.

However, the anniversary is widely considered symbolic, with several states still permitting slavery at that point, and slaves not formally freed until December 1865, when the 13th Amendment fully abolished the practice.

'The United States we know today was built with the labor of enslaved Black Americans,' Nye, 66, wrote Sunday, June 19, in a post that included a selfie of the star clutching a pocket-sized US Constitution.