Blood Not Always Red!

We and many other animals share the same colour of the blood that is red. Anyway there are many other creatures living on earth with different colours of blood. Here we are going to find out what color and why they are coloured so.

Red blood caused by the protein known as haemoglobin. Iron atom in this molecule bind to the oxygen we breathe in order carry it to other parts of the body. The reaction changes haemoglobin's structure so it absorbs and reflects light differently; that's the reason why the oxygenated blood appears red while deoxygenated blood is darker.

While the green blood belong to some marine worms and leeches. They have molecule called chlorocruorin in their blood. The protein have similar structure to haemoglobin, anyway it make their blood green instead of red. There are also animals with blood contains both chlorocruorin and haemoglobin, and it makes their blood color closer to red. So the green blood are not belong to alien out of the space!

There are also creatures with blue blood such octopuses, squid, spiders and some other molluscs. The blue color produced by protein called haemocyanin. Haemocyanin flows freely in the vessels, and contains copper atoms rather than iron. It might appear blue when oxygenated, it is actually colourless when deoxygenated.

When those colours might be in your imagination but not this one, 'purple'. Purple blood colours belong to some species of marine worms and brachiopods. This colour contribute by the protein called haemerythrin. Similar to haemocyanin, haemerythrin is colourless in deoxygenated. While this protein contains iron atoms, compared to haemoglobin it isn't suited to binding with oxygen molecules.

So that's it. There are many other colours of blood that we can include in the next horror movies. 

Mechanical Calculator Another Marvelous Invention

Curta mechanical calculator, one of the marvelous mechanical calculators ever invented.

Why we need to take a look at mechanical calculator when today the digital calculator can works better? Well, the invention of mechanical calculator itself is the result of complicated calculation and mechanical precision, so you can think how useful it was before the digital edge.

Before we go to more complicated mechanical calculator we might want to know more about the simple calculation apparatus such as abacus that had been used in ancient China. This device has been used until today in order to teach kid to know the concept of additional and subtraction.

The advancement of mathematical knowledge requires human to do more repetitive calculation, in large numbers and more complicated task. To safe time on calculations instead of the ideas itself such as in astrology and geometries, the calculation apparatus are very important.

The Napier's bones.

Page from a 1619 book of mathematical tables by Matthias Bernegger, showing values for the sine, tangent and secant trigonometric functions.

A typical ten-inch student slide rule.

There were many types of mechanical calculation apparatus since ancient times. Some of them showing of the result of the calculation rather than input numbers such as the Antikythera mechanism or simplification such as for the astrolabes.

Back to mechanical calculator machine that use specifically to calculate numbers, few of them being invented since as early as 17^th century. One of the best inventions was Pascal's calculator, invented by Blaise Pascal in 1642. On the same century there were few other tools invented like Napier's bones, logarithmic tables and the slide rule. We are all wondering what are those things are!

In 18^th century more complicated mechanical calculator was invented by Giovanni Poleni in 1709. In fact there were many others trying to invent calculation machines such as German Johann Helfrich Müller, French Lépine, German Antonius Braun, French Hillerin de Boistissandeau, German Philipp Matthäus Hahn, and English Lord Stanhope. Maybe there were few others that not documented.

Perhaps the best mechanical calculator ever invented was "Difference Engine No. 1," the invention of Charles Babbage in 1822. The machine has more capabilities of calculating up to seven numbers up to 31 decimal digits each. It also the first calculating machine that comes with printer. The project was abandoned in 1842. Anyway the working replica was built in 2005 by London’s Science Museum.

The working difference engine, built a century and a half based on Charles Babbage's design on display at London Science Museum.

Four of Pascal's calculators and one machine built by Lépine in 1725, display at Musée des Arts et Métiers.

Curta Type I, on display at the Musée des Arts et Métiers, Paris.

Yes, there were many other working mechanical calculators invented before the digital edge provides us with cheaper pocket calculator. The pocket version of mechanical calculator knows as Curta was invented by Curt Herzstark in the 1930s in Vienna, Austria. Until today this mechanical calculator still become one of the favorite for mechanical calculator’s fan to be part of their collection. Some fan even rebuilt this calculator using 3D printer such as the one bought by Adam Savage in his video and we all so envy with it.

10 Hottest Cars Of All Time

Mercedes-Benz 300SL “Gullwing”.

Hottest cars are the cars that once change the view of people about cars, set new standards and bring introduce new look to the world of cars. Some of these cars only been produced in few quantities.

Anyway hottest cars are totally different from any other classification of cars such as Supercars, Expensive Cars, and Sporty Cars and so on, but they can be both. We have the list of 10 Hottest Cars of All Time to show you to know what class they are.

10. Mercedes-Benz 300SL “Gullwing” (1955 - 1957)

9. Ferrari Dino (1968 - 1972)

8. Lamborghini Miura (1966 - 1972)

7. Chevrolet Corvette (1963 - 1967)

6. Porsche 550 (1953 - 1956)

5. Jaguar E-Type (1961 - 1975)

4. Ferrari 330 P4 (1967)

3. Jaguar XJ13 (1965)

2. Alfa Romeo 33 Stradale (1967 – 1971)

1. Ferrari 250 GTO (1962 - 1964)

So what do you think about the list. Why they are not the modern luxurious cars, but still they are the hottest!

The Earliest Electric Cars

Porsche P1, the first car designed by Ferdinand Porsche.

Not all of us realized that the electric cars were among the earliest cars invented before petrol cars became popular in the early of 20^th century. For various reasons the electric cars had been abandoned (perhaps suppressed) to allow petrol engine cars to take over.

The electric cars were pricier, with lower speed limits and shorter range, while petrol cars become more available to the public. Perhaps its demand by the market that make electric cars became less popular in the early 40’s until late 50’s. Still the production of electric cars only in the small quantities – the must be many other factors that caused the situation.

Anyway here we are just want to look at the earliest electric cars produced back then for us to have better understanding why they should become popular again. Some in the list here were the cars produced in large quantities and many others produced in small numbers.

Baker Electric

Was the earliest electric cars produced in large quantities. The first card was a two seater and sold to Thomas Edison as his first car. The nickel-iron batteries used in this car also was invented by Thomas Edison and some of them still can be use until today. By 1907, Baker had seventeen models and the price was getting higher. Baker’s cars also became part of the White House fleet of cars. Anyway by 1913 the company was overtaken in sale by Detroit Electric and, in 1914, merged with fellow Cleveland automaker Rauch and Lang to become Baker, Rauch & Lang.

Studebaker Electric

Studebaker Omnibus one of the electric vehicle produced by Studebaker Brothers.

Studebaker Electric was produced by Studebaker Brothers Manufacturing Company of South Bend, Indiana. This company produced electric vehicles from 1902 to 1912. Studebaker Electrics was produced in wide variety of body styles included the Stanhope, Victoria, and Surrey. A four-passenger model was introduced in 1904. The production of Studebakers was ended by 1912 as the demand on gasoline engines had increased.

Detroit Electric

An electric car produced by the Anderson Electric Car Company in Detroit, Michigan. The cars were produced from 1907 – 1939 and revived in 2008 to produce modern electric cars by Detroit Electric Holding Ltd. of the Netherlands. There were 13,000 electric cars were produced within 1907 – 1939 by the Anderson Electric Car Company. The sales were increased by increasing price of gasoline during the World War 1. Detroit Electrics were owned by few notable people included Thomas Edison, Lizzie Borden, Charles Proteus Steinmetz, Mamie Eisenhower, and John D. Rockefeller, Jr., Henry Ford bought Model C coupe for her wife Clara Ford.

Porsche P1

Porsche P1 on restoration after 112 years.

The series of gears for Porsche P1.

Porsche P1 was the first car designed by Ferdinand Porsche before he and his son created the company, Porsche. The car was produced in 1898 and resembles a wooden crate or an old horse-drawn carriage even though it is actually an electric powered vehicle. It was equipped with 3 hp electric motors and 5 hp by overcharging it. The car could be driven for three to five hours with the range up to approximately 49 miles. What make Porsche P1 so different was the series of gears with 12-speed controller: six for forward gears, two for reverse and four to brake the car. It was found after 112 years in warehouse in Austria and now on display at the Porsche Museum in Stuttgart, Germany.