Scientific Achievements /বিজ্ঞানের বিস্ময়কর আবিষ্কার .
Scientific Achievements
We human beings tend to forget how far we have come as a species in a relatively short period of time .It was only in the 1870 s when we had the first house that was lighted with electricity.Cars just started to become available 100 years ago. Charles Lindbergh made the first trans - Atlantic flight in 1927.Television didn't become widely available until after second world war.In other words ,the advances humankind has made in a relatively short period of time have been nothing short of extraordinary.Perhaps just as extraordinary is how we tend to simply adapt to these incredible changes ,not realising how completely our world has been altered in a short span of time.With that in mind ,it is worth looking back at some of the amazing scientific advances we have made in the last few decades.
Cell phones:
Phones have been around since the late 1800 s , but cell phones made their appearance only in the 1990 s.Today ,but some estimates,more than 100 million people in Bangladesh and more than 4.6 billion people worldwide have mobile phones.Anything that is useful and spreads so fast has to be considered one of the greatest inventions of all time .Just two decades ago ,in Bangladesh,even land lines were difficult to obtain,let alone mobile phones .Today people from all social strata use cell phones ,from street vendors to business executives in luxury cars,and from villagers to urbanites .Since May 2015,Bangladesh joined its South Asian neighbours India (862 million) and Pakistan (122 million) on the list of countries with 100 million or more mobile phone users.The other countries on the list are China (one billion users),Russia
,Brazil,the United States,Indonesia,Japan,Germany,the Philippines and Nigeria.
Personal Computer:
Today,we take for granted that we have one machine that allows us to access the Internet ,do word processing, use a calculator ,watch TV, play games and do a host of other things.
But the personal computer only became available to consumers in 1974.Things really took off whenMicrosoft Windows was introduced in 1985 and it's good that it was since without the prevalence of personal computer ,the Internet wouldn't have had nearly as big an impact as it has ever since.
Satellite:
People on Earth may take for granted today's high-tech world of cell phones ,GPS and the satellites high above the planet that make instant communication possible.But it all began 50 years ago with one giant space balloon. 10 July 1962 marked the birth of satellite
communications.On this day the Tel star satellite commenced its journey into space and became the first ever active communications satellite .It carried the first live trans-Atlantic TV broadcasts .Telstar was built by a team at Bell Telephone Laboratories in the USA and incorporated many innovations such as the transistor and the 3600 solar panels that powered the satellite.Tel star produced 14 watts and relayed its first and non-public television pictures on 11 July 1962.The satellite could carry 600 voice calls and one black and white TV Channel from an egg-shaped orbit.Today ,we use satellites for GPS, TV ,radio,weather tracking,military surveillance,space exploration and global communications,among other things.
Internet/World Wide Web:
The ARPANET,the first Internet,was invented in 1969 and the public only had access to the World Wide Web starting in 1993. Today, just 22 years later,the web has revolutionized the dissemination of information , created a new multi-trillion dollar economic phenomenon,played a role in revolutions,and has interconnected much of the globe.It has also made it possible for people all over the planet to reach out and touch someone.
We human beings tend to forget how far we have come as a species in a relatively short period of time .It was only in the 1870 s when we had the first house that was lighted with electricity.Cars just started to become available 100 years ago. Charles Lindbergh made the first trans - Atlantic flight in 1927.Television didn't become widely available until after second world war.In other words ,the advances humankind has made in a relatively short period of time have been nothing short of extraordinary.Perhaps just as extraordinary is how we tend to simply adapt to these incredible changes ,not realising how completely our world has been altered in a short span of time.With that in mind ,it is worth looking back at some of the amazing scientific advances we have made in the last few decades.
Cell phones:
Phones have been around since the late 1800 s , but cell phones made their appearance only in the 1990 s.Today ,but some estimates,more than 100 million people in Bangladesh and more than 4.6 billion people worldwide have mobile phones.Anything that is useful and spreads so fast has to be considered one of the greatest inventions of all time .Just two decades ago ,in Bangladesh,even land lines were difficult to obtain,let alone mobile phones .Today people from all social strata use cell phones ,from street vendors to business executives in luxury cars,and from villagers to urbanites .Since May 2015,Bangladesh joined its South Asian neighbours India (862 million) and Pakistan (122 million) on the list of countries with 100 million or more mobile phone users.The other countries on the list are China (one billion users),Russia
,Brazil,the United States,Indonesia,Japan,Germany,the Philippines and Nigeria.
Personal Computer:
Today,we take for granted that we have one machine that allows us to access the Internet ,do word processing, use a calculator ,watch TV, play games and do a host of other things.
But the personal computer only became available to consumers in 1974.Things really took off whenMicrosoft Windows was introduced in 1985 and it's good that it was since without the prevalence of personal computer ,the Internet wouldn't have had nearly as big an impact as it has ever since.
Satellite:
People on Earth may take for granted today's high-tech world of cell phones ,GPS and the satellites high above the planet that make instant communication possible.But it all began 50 years ago with one giant space balloon. 10 July 1962 marked the birth of satellite
communications.On this day the Tel star satellite commenced its journey into space and became the first ever active communications satellite .It carried the first live trans-Atlantic TV broadcasts .Telstar was built by a team at Bell Telephone Laboratories in the USA and incorporated many innovations such as the transistor and the 3600 solar panels that powered the satellite.Tel star produced 14 watts and relayed its first and non-public television pictures on 11 July 1962.The satellite could carry 600 voice calls and one black and white TV Channel from an egg-shaped orbit.Today ,we use satellites for GPS, TV ,radio,weather tracking,military surveillance,space exploration and global communications,among other things.
Internet/World Wide Web:
The ARPANET,the first Internet,was invented in 1969 and the public only had access to the World Wide Web starting in 1993. Today, just 22 years later,the web has revolutionized the dissemination of information , created a new multi-trillion dollar economic phenomenon,played a role in revolutions,and has interconnected much of the globe.It has also made it possible for people all over the planet to reach out and touch someone.
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