What keeps you up at night? Pondering deep questions? Excitement about a big trip? Stress about unfinished work? What if the very thing keeping you awake was stress about losing sleep? This seemingly unsolvable loop is at the heart of...

Organisms of all shapes and sizes synchronize their behaviors using biological clocks. Some keep pace with the daily rising and setting sun using circadian rhythms. Others use annual cycles or the changing seasons as their cue. But many...

Purgatorius, a kind of mammal called a plesiadapiform, might've been one of your earliest ancestors. But how did we get from a mouse-sized creature that looked more like a squirrel than a monkey -- to you, a member of Homo sapiens?

The video discusses the importance of end user documentation, such as user manuals and FAQs, in helping consumers navigate and troubleshoot new electronic devices. It emphasizes the role of clear and concise information in guiding users...

2 min video describing the difference between digital and analog signals for middle school science

This video explores the concepts of fear and stress by comparing a sudden bear encounter in nature to the ongoing pressure of looming deadlines. It highlights how fear is the body's immediate response to a threat, while stress is a...

Howcast - The proper method for cleaning any antique clock depends on the clock's age, but there are general rules to follow.

Howcast - Learn how to perform self-hypnosis from clinical hypnotherapist Debbie Catz in this Howcast video.

Howcast - Learn how to tell time in English with this Howcast video featuring ESL teacher Megan Brach.

Howcast - Learn how to handle adolescent sleep problems from Jennifer Wider, M.D. in this Howcast video.

Howcast - Learn how to turn right and left in merengue from professional dancers Ernesto Palma and Crystal Rodriguez in this Howcast dance video.

Howcast - Learn about the best muscle-building dinners from DreamBodies' Tony DiCostanzo in this Howcast bodybuilding diet video.

Howcast - Learn how to make a Minecraft clock with this gameplay tutorial.

Howcast - Hour of Power—especially popular at the stroke of midnight on 21st birthdays, it's not so much a game as an experience.

Howcast - Learn how to train your baby to sleep on a schedule from pediatrician Dyan Hes, M.D. in this Howcast video about newborn and baby development.

Howcast - Learn how to encourage children to read a book from reading specialist Anne Glass in this Howcast video.

Howcast - Learn how to sing the classic kid's song Hickory Dickory Dock with this Howcast video.

Howcast - Learn how to do hula hoop isolations from hula hooping expert Natalie "McFancy" Wise in this Howcast video.

Howcast - Find out what you'll see on a trip to the Chowmahalla Palace in Hyderabad in this Howcast travel video.

Howcast - Learn what blitz chess is from Chess NYC in this Howcast video.

Howcast - Your body is more affected by losing one hour of sleep than you might think! Make this year's transition easier with these tips.

Howcast -Graduating from high school marks the beginning of a new adventure. Give a memorable gift that will help the new grad on their adventure.

Howcast -Learn how to change the screensaver on your Mac in this Mac tutorial from Howcast.

So you've been invited to watch the big game with a bunch of hardcore fans, but basketball's not really your bag? Not a problem—just take a moment to check out this handy hoops cheat sheet.