Many Interesting Facts

Interesting and free educational stuff I find on the web

Month: October, 2013

Facts about water

Interesting facts about water

We can’t imagine life without water (before you disagree, please don’t forget beer is also for the most  part made of water) and I decided to put together a post about water facts, accompanied with some of the best photos available on-line.

All photos are of course public domain and royalty free, but I wouldn’t mind if you give me a nice credit for anything interesting you might find on this page.

Here we go with some fascinating numbers:

– more than 70 percent of Earth’s surface is covered with water,

– there is more water under the surface than on the surface,

– human body is 70 percent made of water (newborns even more),

– only 3 percent of water on our planet is drinkable (most of it we use it for washing, watering and other non-drinking related goals),

– quality standards of drinking water are falling rapidly.


Abundance of water on our planet can be deceptive

Water and health:

– we can live without food for months, but without water for only about a week,

– if we drink too much water, we can destroy the balance of electrolytes in organism and die,

– every fourth person on Earth doesn’t have daily access to clean, drinkable water,

– more than four millions of people die every year because of water related diseases,

– four out of five diseases in developing world are directly related with water,

– regular hands washing is single and most effective prevention for most of diseases.


Majority of diseases is related with water

And now for the statistics…

Longest rivers in the world

1. Nile … 6.650 km (4.130 miles) … world longest river and longest river in Africa

2. Amazon … 6.400 km (3.975 miles) … second longest river and longest river in America

3. Yangtze … 6.300 km (3.920 miles) … Asia’s longest river

4. Mississippi – Missouri … 6.275 km (3.900 miles) … longest river in USA and North America

5. Yenisei … 5.540 km (3.450 miles)

6. Yellow River … 5.465 km (3.400 miles)

7. Ob … 5.410 km (3.365 miles)

8. Parana … 4.880 km (3.030 miles)

9. Congo … 4.700 km (2.920 miles)

10. Amur … 4.450 km (2.760 miles)


Photo of Saratov bridge across Volga

And here is the photo of Volga, the longest river in Europe (3.645 km or 2.265 miles) but only the 17th in the world.

All used photos are public domain and the come from my favorite sources: Pixabay and Wikimedia. Thanks!

Pink Tones: List of Different Shades with Names

Here we have huge list of different shades of pink which is of course far from being complete. I decided to call in 50 shades of pink, but it we could easily count up to one hundred and more. But let’s start at the beginning…

What two colors make pink?

This one is easy. By definition pink is mix of red and white. If we ask how many parts of red and how many part of white do we need, things can get a bit complicated. Only varying of these percentages can make hundreds of hues of pink. Well, if we add a bit of yellow or blue or even both (besides red the only basic colors) things can become really complicated. interesting.

Let’s start with first set of pink tones in no particular order:


It is obvious some shades can be very pale and sometimes they don’t really look pink at all or they look pinkish only in the combination with some other color. As you may notice, there is a set of numbers and characters (actually only numbers in hexadecimal code) which can be of big help when we want to get certain colors in our on-line projects.

And here are their common names:

FAEBD7 Antique White              
F2BB66 Macaroni and Cheese
E2A76F Brown Sugar
DEB887 Burly Wood
FFCBA4 Deep Peach


Despite some similarities we are now dealing with two completely different sets of colors:

EE9A4D Sandy Brown
C19A6B Camel Brown
C47451 Orange Salmon
C36241 Rust
FFEBCD Blanched Almond


Everything is still brownish, so instead of saying this or that kind of pink we should use next names:

FFE5B4 Peach
E67451 Sunrise Orange
FF7F50 Coral
F9966B Light Salmon
E18B6B Dark Salmon

Ready for more lively tones?


E78A61 Tangerine
FFB6C1 Light Pink
FF69B4 Hot Pink
FF00FF Magenta
F1DDCF Champagne Pink

Maybe I shall add magenta is kind of another bordeline case. It has certain amount of blue which pushes pink to the family of violets.

Ready for next set?


And the corresponding names:

E77471 Light Coral
F75D59 Bean Red
FF1493 Deep Pink
E55451 Valentine Red
C24641 Cherry Red

Please note these numbers and names are not absolute because there are several coexisting standards for both, for example, i have found two completely different colors with the same name (carnation pink) in the list of html codes of colors, third on Wikipedia and fourth on the list of Crayola colors. I bet  professional designer can add two or three more examples without too many troubles.

We can still learn:


Having a lot of blue and yellow we are close to brown again. Check the list:

7D0552 Plum Velvet
7F4E52 Rosy Finch
B38481 Rosy Brown
C5908E Khaki Rose
C48189 Pink Bow

And another one series of five:


Kind of classic, right?

F1DDCF Champagne Pink
FDDDE6 Piggy Pink
F4C2C2 Baby Pink
EFBBCC Cameo Pink
FF91AF Baker-Miller Pink

Baby Pink is of course ‘default color’ of bay girl’s clothes and was first used in 1928. It is among the most popular colors for clothes. Baker-Miller Pink (named after US Navy officers) is on the other side used to paint the walls of correctional institutions. The reason is its effect on emotions. While it can help to calm down many people, some of them can actually get irritated with the sight at it. Maybe you know it by one of another names: Schauss Pink, Drunk-Tank Pink or simply P-618.

Ready for more?


The common names are appropriately girlish:

C48793 Lipstick Pink
FCDFFF Cotton Candy
FFDFDD Pink Bubblegum
FBBBB9 Misty Rose

Another set is special because the tones / tints / hues / shades of pink are named by countries.


These are:

F7BFBE Spanish Pink
E4007C Mexican Pink
F77FBE Persian Pink
F64A8A French Rose
A8516E China Rose

We could present even more examples, because some cities are proudly connected with specific shades of pink too, but I would like to finish with a set of pink tints inspired by flowers and fruits. Although have already seen several and there are more (you can find full set of fuchsia shades for instance) we are approaching to our main goal – 50 shades of pink – this will be the last series for this post.


E799A3 Pink Daisy
FFA6C9 Carnation Pink
F19CBB Amaranth Pink
FC6C85 Watermelon Pink
FF77FF Fuchsia Pink

Did you find all the pink tones you were looking for?