Showing posts with label christmas. Show all posts
Showing posts with label christmas. Show all posts

Tuesday, December 7, 2010

Christmas Science2: Reindeer Gender

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

Reindeer Gender
For now, we'll confine ourselves to the non-flying type. More about flying reindeer later in the series.
Reindeer (Rangifer tarandus) vary considerably in colour and size, with both genders growing antlers. There is some debate as to the gender of Santa Claus' reindeer. While both male and female reindeer grow antlers, males loose theirs at the end of mating season (early December).

This would suggest that all of Santa's reindeer must be female. Indeed, except for Rudolph, there is really no indication in their names to sugest otherwise. Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner and Blixen could all refer to females rather than males.

A reindeer's antlers are unique to the individual animal, just as fingerprints are unique to humans. This allows them to be tracked and monitored in the wild and in parks.

In terms of surviving in cold conditions, like the North Pole, the reindeer has hairs which are hollow in order to trap air and increase their bouyancy, thus allowing them to swim.

Monday, December 6, 2010

Christmas Science 1: Frankincense

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

Frankincense
According to the Christmas story, one of the Magi brought a gift of frankincense to the infant Jesus shortly after his birth. It is an aromatic resin that comes from trees of the genus Boswellia and is used in perfumes and incense.

The bark of the tree is slashed to release the resin which hardens on the bark of the tree.Depending on the location of the tree and the climate, different grades and quality of frankincense can be produced, its quality based on colour, purity, aroma and age.

Frankincense was used in religious rites and ceremonies and the Egyptians ground the charred resin into a black powder called kohl. This was used to make the distinctive black eyeliner seen on many figures in Egyptian art.

Frankincense has been investigated as a treatment for ailments from Crohn's disease and arthritis to various cancers.

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