Well, it’s that time of year again – and there it is; just four words into an article on Christmas I’ve used the word ‘time.’

Among the hodge-podge of rituals and holidays that survive in the post-Christian West, Christmas might just be the one that tells us the most about how humans relate to and experience temporality.

Christmas,
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Walk into any public square or shopping mall at this time of year and an encounter with a traditional Christmas carol is well-nigh unavoidable.

We may not sing them ourselves with anything like the frequency or fervor we once did at church but the tunes themselves defy relegation to our past.

At 3 pm on Christmas Eve, millions of radios around the world will be tuned to the Festival of Nine Lessons and Carols from King’s College Chapel in Cambridge in time to hear the pure voice of a single boy chorister singing one of the hardest solos of the church calendar, the first verse of “Once in Royal David’s City”.

For many, this signals the start of Christmas. Broadcasts of the Christmas Eve service from King’s began in 1928, but arguably it was under the guidance of Sir David Willcocks, who died in September 2015, aged 95, that the service – and the choir – became household names.

We don’t need to be Christian to celebrate Christmas. That’s been true for a long time. We don’t even need to be religious. Considering the commercialization of the holiday, that might be an advantage.

But there is no way to get around the religious iconography. Jesus, nativity scenes and Christian symbols are everywhere. So how do you explain this to your children – or someone else’s children – if you and they are not religious?

Every year, almost without thinking about it, we incorporate certain plant species into our Christmas celebrations. The most obvious is the Christmas tree, linked historically in England to Prince Albert – but its use in British homes goes back to at least 1761 when Charlotte wife of George III put up a tree at the royal court. (It’s probably worth noting here that the first artificial-brush Christmas tree was produced using the same machinery that was originally designed to produce toilet brushes.)

During winter it can sometimes feel that the whole day passes in the blink of an eye and that evening darkness comes far too quickly. While more daylight would be a lovely thing, the early darkness has one big advantage: the stars. On a clear evening you can look up and see far into space. I’ve spent many winter evenings with my children, on our way home from activities, looking for Orion (and other constellations), following its path through the seasons.

Stars and space are two of the most popular science topics, whatever the age of the child.

PITTSBURGH, Dec. 22, 2015 - Children younger than 5 who live in economically disadvantaged areas had a greater risk of medication poisoning that resulted in referral to a health care facility, according to scientists at the University of Pittsburgh Graduate School of Public Health and the University of California, San Diego. These areas were rural and experienced high unemployment, along with lower rates of high school graduation and lower household income.

The analysis of Pittsburgh Poison Center data, published online and scheduled for print in the January issue of Clinical Toxicology, gives insight into potential geographic targets for poison prevention outreach.

CHAMPAIGN, Ill. -- A number of drugs already approved to treat parasitic infections, cancers, infertility and other conditions also show promise as antibiotic agents against staph and tuberculosis infections, according to a new study by University of Illinois chemists and collaborators. Because these agents act against multiple targets within the bacteria, it may be harder for bacteria to develop resistance.

The new study, led by Illinois chemistry professor Eric Oldfield, was published in the Proceedings of the National Academy of Sciences.

NEW YORK, NY - Cannabidiol (CBD), a medical marijuana derivative, was effective in reducing seizure frequency and well-tolerated and safe for most children and young adults enrolled in a year-long study led by epilepsy specialists at NYU Langone Medical Center.

Vultures are poor flappers and need to soar in order to fly, relying on updrafts to gain altitude. Spend enough time watching vultures, though, and you'll notice them wobbling at low altitudes as well as circling high in the air. New research in The Auk: Ornithological Advances shows how vultures use small-scale turbulence to stay aloft even when weather conditions don't favor the formation of thermals. The mechanism and purpose of this behavior, which researchers have dubbed 'contorted soaring,' are explained for the first time in the forthcoming article.