Green Hydra

We just learned about the String Jellyfish.

Another type of hydrozoan is a Green Hydra, also called the Hydra Viridissima.

These are skinny green animals with tentacles, that are very small, only about 10 milimeters.

They eat tiny little insects and crustaceans.

Green Hydras mostly do not swim around anywhere and usually just live on top of other things in the water like plants.

Their green color comes from a type of green algea that grows on their body.

They can flex their body a little to move around if they have to, but mostly they just stay on the plant they are attached to.


(from: wikipedia - hydra viridissima)


Giftige Tierwelt: faszinierende Lebewesen im Tümpel. Süßwasserpolyp, Hydra viridissima - nature tv Lothar Lenz

Kid Facts - Blast from the past: Pharaoh Cuttlefish

Cornea

We just learned about how we get different Eye Colors.

Another part of the human eye is the Cornea.

This is the clear bubble that is on the front part of your eye.

It works kind of like a magnifying glass, and helps bring light into the eye so you can see.


(from: wikipedia - cornea)


Kid Facts - Blast from the past: Tooth Impaction

Yett

We just learned about the Portcullis door that slides down.

Another type of castle door is the Yett.

This is a door made out of wrought iron bars, but it is on hinges and swings open and closed sideways like a normal door.



(from: wikipedia - yett)


Kid Facts - Blast from the past: Buda Castle

Fifty Bibles of Constantine

We just learned about the Four Great Uncials.

Another part of early Christianity is the Fifty Bibles of Constantine.

When Constantine made it safe to be a Christian in Rome, a lot of people became Christians, and new churches started being made.

In these old times, they didn't have easy ways to make copies of books.
A person called a scribe had to write down by hand every single word every time they wanted to make a copy, so it was a lot of work.

Constantine wanted to make sure that all of the churches were teaching the right things, so he ordered that his scribes make 50 copies of the Bible, and that they would be sent to all the churches in the city of Constantinople.

Most of those Bibles were lost, but some people believe that the Four Great Uncials we just learned about where part of that collection.


(from: wikipedia - fifty bibles of constantine)


Kid Facts - Blast from the past: Linus - bishop of Rome

Olmec Colossal Heads

We just learned about the Nubian Pyramids in Africa.

Another group of ancient sculptures are the Olmec Colossal Heads.

These are in the states of Veracruz and Tabasco, in Mexico.
They were made thousands of years ago, by the Olmec people who lived in that area long ago.

Archeologists have found 17 different heads built in the area, and all of them, from 4 feet to 11 feet tall.
Because they are so big and heavy, people think that these heads must have been made to honor rulers like kings or queens from those days.



(from: wikipedia - olmec colossal heads)


Kid Facts - Blast from the past: He Zun

Norwegian - Counting to Seventy Nine

We counted to 69 in Norwegian, let's keep going!

70 sytti - sounds like seh-tee
71 sytti en - sounds like seh-tee ay-uhn
72 syttito - sounds like seh-tee too
73 syttitre - sounds like seh-tee t-day
74 sytti-fire - sounds like seh-tee fee-dah
75 syttifem - sounds like seh-tee fam
76 syttiseks - sounds like seh-tee seh-ks
77 sytti syv - sounds like seh-tee see-v
78 syttiåtte - sounds like seh-tee oh-tuh
79 syttini - sounds like seh-tee nee


(from: wikipedia - norwegian language)

Greek: εβδομήντα (evdomínta), εβδομήντα ένα (evdomínta éna), εβδομήντα δύο (evdomínta dýo), εβδομήντα τρεις (evdomínta treis), εβδομήντα τέσσερις (evdomínta tésseris), εβδομήντα πέντε (evdomínta pénte), εβδομήντα έξι (evdomínta éxi), εβδομήντα επτά (evdomínta eptá), εβδομήντα οκτώ (evdomínta októ), εβδομήντα εννέα (evdomínta ennéa)

ASL: seventy, seventy one, seventy two, seventy three, seventy four, seventy five, seventy six, seventy seven, seventy eight, seventy nine

Italian: settanta, settantuno, settantadue, settantatre, settantaquattro, settantacinque, settantasei, settantasette, settantotto, settantanove

German: siebzig, einundsiebzig, zweiundsiebzig, dreiundsiebzig, vierundsiebzig, fünfundsiebzig, sechsundsiebzig, siebenundsiebzig, achtundsiebzig, neunundsiebzig

Spanish: setenta, setenta y uno, setenta y dos, setenta y tres, setenta y cuatro, setenta y cinco, setenta y seis, setenta y siete, setenta y ocho, setenta y nueve

French: soixante-dix, soixante et onze, soixante-douze, soixante-treize, soixante-quatorze, soixante-quinze, soixante-seize, soixante dix sept, soixante dix huit, soixante dix neuf

Bearing

We just learned about the Axle.

Another part of machine work is a Bearing.

This is something that lets one part of a wheel spin around without moving another.
Like on a fidget spinner, you can hold the middle of it and the outside will spin around.
Or like a front bicycle wheel, the wheel will spin around the hole in the middle where the front handlebar is attached.

Usually this is done using ball bearings, which are tiny little balls covered in slimy grease.
On the outside is one metal cylinder, then a bunch of ball bearings, and then a smaller inside cylinder.

The outside cylinder can spin while the inside one is stopped, or the other way around.



(from: wikipedia - bearing (mechanical))


Kid Facts - Blast from the past: Attitude Control