Presbyopia

We just learned about the Astigmatism.

Another kind of refractive error is Presbyopia.

This is something that usually happens to older people, when the lens of the eye gets harder.
When that happens the eye focuses light behind the retina instead of right on it.

If someone has this presbyopia, they usually can't read small printed words, and a lot of times they have to hold things away from them to see them better.



(from: wikipedia - presbyopia)


Kid Facts - Blast from the past: Parotid Gland

Nunatak

We just learned about the Onyx River.

Another part of Antarctica is a Nunatak.

This is a rocky part of a mountain that sticks up out of a glacier.

Nunataks are important because many times they are the only place that plants and animals can live in cold places like Antarctica.


(from: wikipedia - nunatak)


Kid Facts - Blast from the past: Outworks

Franciscans

We just learned about the Battle on the Ice.

Another part of early Christianity is the Franciscans.

Long ago a man named Francis of Assisi decided to go live by himself like a hermit.

A bunch of other people who also wanted to live away from other people to worship God together and called themselves Franciscans, because of Francis.

These groups of people became the monks that we know about today.


(from: wikipedia - franciscans)


Kid Facts - Blast from the past: First Council of Nicea

Vietnam Veterans Memorial - Maya Lin

We just learned about the Marine Corps War Memorial - Felix de Weldon.

Another famous American monument is the Vietnam Veterans Memorial made by Maya Lin in Washington D.C. in 1981.

In 1981 there was a contest to see who could come up with the best sculpture for a new memorial for the people who died in the Vietnam War.

Maya Lin won the contest, and her idea was to have a big black wall made of granite, with the names of all of the people who died engraved on it.

The memorial is v-shaped when you look at it from above, and her idea was that it would look kind of like a wound that needed to heal for America.


(from: wikipedia - vietnam veterans memorial)


Kid Facts - Blast from the past: Akan Goldweights

Russian - Counting to Twenty

We counted to 15 in Russian, let's keep going!

16 шестнадцать (shestnadtsat') - sounds like sheh-st-nah-t-sit 文A

17 семнадцать (semnadtsat') - sounds like see-im-nah-t-sit 文A

18 восемнадцать (vosemnadtsat') - sounds like voy-see-im-st-nah-t-sit 文A

19 девятнадцать (devyatnadtsat') - sounds like dee-ay-vit-nah-t-sit 文A

20 двадцать (dvadtsat') - sounds like d-vah-t-sit 文A



(from: wikipedia - russian academy of sciences)

Norwegian: seksten, sytten, atten, nitten, tjue

Greek: δεκαέξι (dekaéxi), δεκαεπτά (dekaeptá), δεκαοχτώ (dekaochtó), δεκαεννέα (dekaennéa), είκοσι (eíkosi)

ASL: sixteen, seventeen, eighteen, nineteen, twenty

Italian: sedici, diciassette, diciotto, diciannove, venti

German: sechzehn, siebzehn, achtzehn, neunzehn, zwanzig

Spanish: dieciséis, diecisiete, dieciocho, diecinueve, veinte

French: seize, dix-sept, dix-huit, dix-neuf, vingt

Fire-Tube Boiler

We just learned about the Locomotion No. 1.

Another part of how steam locomotives work is the Fire-Tube Boiler.

A boiler is a big tank of water that is heated up to where the water boils and turns to steam.
There are a lot of different kinds of boilers, and the one called a fire-tube boiler was the one most used by steam locomotives to run the engine.

It's called a fire-tube boiler because there are a bunch of metal tubes that take in heat from a fire and then the heated up tubes make the water hot.

The hot water then turns to steam that is used with a steam pump to drive the gears that turn the wheels of the train.



(from: wikipedia - fire-tube boiler)


Kid Facts - Blast from the past: Motor

Pallas's Cat

We just learned about the Caracal.

Another type of wild cat is the Pallas's Cat, also called the manul, or otocolubs manul.

This is a cat about the size of a house cat, 2 feet long and weighing about 10 pounds.
It has thick grey fur that makes it look short and fat, with a flat face.

It lives in the grasslands of Asia, mostly living in caves and hunting small animals.




(from: wikipedia - pallas's cat)


Kid Facts - Blast from the past: Blue Button