Getting to the Icy Heart of Comets

What is inside a comet’s nucleus? Marshmallows? Chewy caramel? Nuts? Introduction A comet’s nucleus is in the center of its coma. A comet’s nucleus is like a snowball made of ice. As the comet nears the Sun, the ice starts to melt off, along with particles of dust. These particles and gases make a cloud around the[…]

Traveling Brew: The Coldest Brew – Tonx Aeropress Prep in Antarctica

Great coffee shouldn’t be dictated by geography. By David Hochman I’ve been known to go the extra mile for a great cup of coffee. This week, I went to the farthest ends of the earth for one. Onboard Lindblad Expeditions National Geographic Explorer and with an assist from the folks at Tonx Coffee in Los Angeles, I enjoyed the finest[…]

On Thin Ice: A History of Antarctica

The name Antarctica comes from the Greek antarktikos, meaning “opposite to the Arctic.” Curated/Reviewed by Matthew A. McIntoshPublic HistorianBrewminate Introduction Antarctica is Earth’s southernmost continent, overlying the South Pole. Situated in the southern hemisphere and largely south of the Antarctic Circle, Antarctica is surrounded by the Southern Ocean. At 14.4 million km², it is the fifth-largest continent in area after[…]

A History of Ice Ages and Their Causes

Over the last 800,000 years, Earth has been through 11 major ice ages. Is another on the way? Curated/Reviewed by Matthew A. McIntoshPublic HistorianBrewminate Introduction An ice age is a long period of reduction in the temperature of the Earth’s surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth’s climate alternates[…]