This French explorer spent months underground to study biological rhythms
A study by Miles et al (1977) showed that blind people rely on these internal cues rather than light
Researchers found that shift workers often get between 1-4 hours less of this
The approach used by Siffre to study the sleep-wake cycle
A type of rhythms that repeats more than once per day, such as the sleep cycle
The biological clock located in the hypothalamus
A type of work schedule that disrupts normal sleep patterns and can increase errors
The central pacemaker of the brain that controls circadian rhythms
A type of shiftwork where workers change their schedules frequently
A phenomenon where circadian rhythms become misaligned due to rapid travel across time zones
A rhythmically occurring natural phenomenon which acts as a cue in the regulation of the body's circadian rhythms
The natural length of the human sleep-wake cycle, according to research in the absence of external cues
Verticales
These internal biological timekeepers help regulate sleep-wake cycles
The gland that secretes melatonin to regulate sleep
The readiness to transit from wakefulness to sleep, or the ability to stay asleep if already sleeping
The hormone associated with sleep regulation
Rhythms that last longer than a day, such as the menstrual cycle
A hormone secretion cycle that follows a circadian rhythm
A biological rhythms that last one year, such as hibernation
The rhythmic fluctuations in physiological functions such as hormone secretion
The period in the early evening when sleep propensity (natural tendency) is highest
External cues such as light
Jetlag is less when travelling in this direction
A key external cue that synchronises circadian rhythms
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All your puzzles are accessible from your 'My Puzzles' page, which you can access using the navigation bar at the top when you are logged in.
Be sure to log in using the same email address you used when you created your puzzle.
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There is a 'Make Printable' button on the top left of your puzzle that will let you sign up for a plan or purchase a single puzzle.
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Once you publish your puzzle, you can click the print icon or use your browser’s print function.
It looks weird when printed.
First make sure you’ve published your puzzle. See the 'How do I print?' section above for more information.
99% of other printing issues have to do with printer settings. Instead of trying to fiddle with printer settings, which can be time-consuming and frustrating, there are a couple workarounds you can try.
You can try printing from a different browser, since different browsers have different default print settings. Alternately, you can try saving as a PDF (next to the print icon) and print that.
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We invested in building a number of premium features that free sites are unable to offer: the ability to automatically or manually add words to your puzzle, save-as-you-go puzzle editing, the ability to access your puzzles from any computer, an uncluttered and ad-free interface, the ability for friends and colleagues to solve your puzzles online, and quick responsiveness to reported issues.
My Crossword Maker is the lowest-price service we've found that provides these features, and is designed for people who are not satisfied with what free sites are able to provide.
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We’re constantly trying to provide a clear and straightforward user experience, and we’re not trying to hide the price: on the page where you make your puzzle, the price is listed in the overview in the top left (before you log in), below the 'Make Printable' button (after you log in), in the FAQ below the grid, and also in the tour.
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Not all my words are in my puzzle.
When you hit the 'Arrange' button, our algorithm will try to arrange all your words on the grid, and will move words around to try to fit the most words.
This will get all the words on the grid about 90% of the time, depending on the word list. For the other 10%, you will get an alert explaining that the words that did not fit were added to the scratchpad.
It prints on two pages.
Big puzzles won’t always print on one page — the clues and grid are the smallest we could make them while keeping them readable for everyone.
That said, different browsers print in slightly different ways, so you could try using 'print preview' using a different browser (or try the PDF button) to see if you like how that looks better.
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