- Antarctica - The World Factbook (cia.gov)
Speculation over the existence of a “southern land” was confirmed in the early 1820s when British and American commercial operators and British and Russian national expeditions began exploring the Antarctic Peninsula region and other areas south of the Antarctic Circle. In 1840, it was finally established that Antarctica was indeed a continent and not merely a group of islands or an area of ocean.
- David O. Sacks (Wikipedia)
David Oliver Sacks (born May 25, 1972) is a South African-American entrepreneur, author, and investor in internet technology firms. He is a general partner of Craft Ventures, a venture capital fund he co-founded in late 2017. Additionally, he is a co-host of the All In podcast, alongside Chamath Palihapitiya, Jason Calacanis and David Friedberg. Previously, Sacks was the COO and product leader of PayPal, and founder and CEO of Yammer. In 2016, he became interim CEO of Zenefits for ten months. In 2017, Sacks co-founded Craft Ventures, an early-stage venture fund. His angel investments include Facebook, Uber, SpaceX, Palantir Technologies, and Airbnb.