The Sun and the Solstice
The winter solstice is just ahead for the Northern hemisphere – in California it will occur at exactly 8:19 PM on Saturday December 21. On that date and at that time, the Sun will reach [...]
The winter solstice is just ahead for the Northern hemisphere – in California it will occur at exactly 8:19 PM on Saturday December 21. On that date and at that time, the Sun will reach [...]
When mammoths, mastodons, ground sloths, horses and other Pleistocene megafauna became extinct in the Americas some 12,000 or so years ago, what happened to the plants those animals were eating? It’s an interesting story, especially [...]
A curious fact: Arabian Peninsula countries import tremendous amounts of sand. There is no shortage of this material in the Arabian Desert – beautiful quartz grains that have blown around for eons and are now [...]