Science/Technology Archives – Page 19 of 39

April 3, 2023April 5, 2023

C is for Camel

There is an old British joke that a camel is a horse designed by a committee. Attributable to Sir Alec Issigonis (who originated the Mini auto), the last laugh might be on Sir Alec if he tried to cross the Asian deserts with only horses. While horses did originate and thrive in the grasslands of Asia, the camels always ruled the dunes, whether the sand was in the Sahara, the Gobi, or even the deserts of Australia. A Mini wouldn’t last very long trying to cross the Silk Road. Camels–in particular the Bactrian camels–were the ships that sailed across the Asian deserts.

The camel has a single hump;
The dromedary, two;
Or else the other way around.
I’m never sure. Are you?
Ogden Nash

The mnemonic to separate the two types of domesticated camels, the Bactrian from the Dromedary, is pretty simple. “B” has two humps, whereas “D” has one. The problem is remembering the mnemonic. Maybe after this post, we’ll all just remember the difference.

April 3, 2023April 5, 2023

B is for Bombyx Mori

12th c. image of silk production, from James Hare website.

Here we go round the Mulberry Bush, the Mulberry Bush, the Mulberry Bush
Here we go round the Mulberry Bush
All on a Frosty Morning…

Were they experimenting, those first enterprising Chinese textile workers who pulled the threads off a caterpillar’s cocoon and found them to be strong and fine? Did they know to dip them in water to separate them from the egg or was that an accident, like most inventions? There may be up to a mile in threads in a single cocoon, so say the advertisements, and placing the unopened cocoon in water frees them.

The Chinese discovered as far back as the Neolithic Age (the New Stone Age) that the wispy strings of the cocoon could be spun into a cloth delicate, shiny, and strong. They held the secret close for centuries, until someone smuggled the cocoons and the mulberry out, to try it on their own.

Not everyone succeeded. Historian/humorist Bill Bryson thinks that the mulberry bush song we may have sung as kids reflectsthe frustrations of the 18th and 19th century British, who tried to replicate the Chinese silk production but found their climate too inhospitable on those frosty mornings.

The cocoons like it warm.

Worm/caterpillar Bombyx Mori with its cocoon.

February 7, 2023February 9, 2023

Drought’s Over, Right?

One good January won’t reverse climate change. Photo from Reuters.

Californians always seem to have too much of something: too much sun, too much traffic, too much money, too much water in the wrong place at the wrong time, and not enough elsewhere. Our recent spate of rainy days caused massive flooding and damage, and we gritted our teeth, slowing down for all the construction equipment, muttering the magic words “snowpack” under our breath. Every day in late December and January, the local newscast would have a story that started with, “The rain this past week has everybody asking, ‘Is the Drought over?'” Researchers say…

No!

The creek near Niles Canyon. Spikes won’t last long enough. Photo from waterdata.usg.gov.

It Ain’t Enough

Our snowpack level is at 205%. Woohoo! Creeks have flooded, hills have slid, and all the measurements that can have spiked. But don’t be fooled by all the temporary flooding.

There is good news. The snowpack is at its deepest level in 30 years. News stories like this one are saying “the drought could be coming to an end.” Dams like Shasta and Oroville are back up to 65-70%. This is cool! How many times have we driven by Mt. Shasta when it didn’t have any snow in March? That was depressing. This is good. We want rain; we want snow. Sorry to all of you stuck in snow traffic on highway 50. Too many, California, too many skiers, too much traffic. Same as it ever was.