Hollywood often paints a romanticized vision of space travel, but living in a gravity-free environment has dirty downsides. It takes a lot of extra work for an astronaut to tend to their personal hygiene in space. Sometimes, they're even...

Learn English cleaning vocabulary with this #shorts series.

Back on terra firma this week, we’re exploring the red desert, mustering a camel before Kayne has to catch its urine and comb his hair with it!

Learn English cleaning vocabulary.

Ancient Rome was at its apex from the second century BC through the second century AD. During the Pax Romana of the first and second centuries AD, Rome benefited from the expansion of its empire, with vast amounts of wealth and diverse...

How new easy to use field tests are being employed to hold back the spread of syphilis in Kosovo and trachoma in Tanzania. Both infections are caused by the same bacteria. In Tanzania it's also regarded as a disease of the poorest of the...

In 1851, the US government passed the Indian Appropriations Act, creating reservation lands for Native Americans. For decades prior, the US government had forcefully moved and abused Native American tribes, most notably through the...

Robert Lin, the late director of the Space Sciences Laboratory, discusses how NASA's MAVEN spacecraft will study the interaction of the Martian atmosphere with the solar wind. MAVEN's findings will reveal how Mars lost its early...

Mars has been all over the news and media lately. It certainly looks like humans will set foot upon its surface very soon! Just in case you're one of the lucky people who get to go, you'd better learn all about the planet first, don't...

Characteristics of various ocean zones, including variations in ocean temperature, salinity, and depth are discussed. The different groups of marine life and adaptations of plants and animals are highlighted. Estuaries and various...