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From ancient days Man had try to make robots which resembles him but
far more stronger and effient them him. But what ever it may be robots
can not be same as man,

robot can not be perfect human there will be
something would be missing that is mans thinking power

which is God
gift to him. So some came to the idea that

if we can't make robot as
human being, we can give strength of robot to human.

Thats he will be
controlling the robot.
So in this case we cannot alter human body parts so scientist thaught
of making an exoskeleton for man. Which gives him the power of robots.

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Well

exoskeleton is the external skeleton found in some animal or
insects

like crab,lobster etc. Which protect their inner body from any
damage and gives strength to for them. So if human has these kind of
exoskeleton he will be more stronger and it will support our inner
skeleton. But there will be some

problems in our way making it that
are

3D the short fo3D the short form of the word 3 dimensional.It is the most trendy topic in the modern technology. it means that viewing an object in three dimension that in the x. y and z axis respectively. that's nothing but what we are seeing our atmosphere with our eye to re create that effect in the entertainment the invention of 3d had occurred and now it has many more application some are listed here : 

3d movies : 

Yes we are not joking its 100% real. A Indian American girl 'Esha
khare' has invented a device which can pack lot of energy in the tiny
space. And also it can store energy thats enough to light a light
emitting diode[LED]. And if we fix it to the battery of normal phone
it can reacharge the battery in 20seconds or even less. It can also
charge the battary 10,000 times when our normal battery losses its
ability in 1,000 times. So this tiny capacitor called as 'supper
capacitor'. She is studying in california. And she won price money of
50,000$ from intel science and engineering fair for her super
capacitor. Now google has shown intrest in her invention and came
front to sponcer her invenstion.
Technical specifications:
In her project summary, Khare has clearly mentioned her objectives,
methods and results.
Her goal was to design and synthesise a super capacitor with increased
energy density while maintaining power density and long cycle life.
She designed, synthesised and characterised a novel core-shell nanorod
electrode with hydrogemated TiO2(H-TiO2) core and polyaniline shell.
H-TiO2 acts as the double layer electrostatic core.
Good conductivity of H-TiO2 combined with the high pseudo capacitance
of polyaniline results in significantly higher overall capacitance and
energy density while retaining good power density and cycle life.
This new electrode was fabricated into a flexible solid-state device
to light an LED to test it in a practical application.
Khare then evaluated the structural and electrochemical properties of
the new electrode. It demonstrated highcapacitance of 203.3 mF/cm2
(238.5 F/g) compared to the next best alternative super capacitor in
previous researchof 80 F/g, due to the design ofthe core-shell
structure.
This resulted in excellent energy density of 20.1 Wh/kg,comparable to
batteries, while maintaining a high power density of 20540 W/kg. It
also demonstrated a much higher cycle life compared to batteries, with
a low 32.5% capacitance loss over 10,000 cycles at a high scan rate of
200 mV/s.
Therefore, she successfully managed to introduce this new energy
device to replace conventional batteries in flexible electronic
devices.
So it is not far away to charge our mobile phone in 20
seconds.

You might have seen how the communiction system is growing now a days. There was a rapid change in it which even now doesn't seems to stop. Thats fine but do you know how communication now a day works,its not like old analog cable. These analog cables are replaced by unvisible,undisturbable electromagnetic waves. You may know that there is a magnetic field around the earth,in that some if you pass some electric signal the pushes each other and and travell in the air for long distance,even the quality is also high. The question araising is how to add electric field in air,its actualy uses series of LCR circuit. Our massage is inserted in these waves as change in frequency or the phase of this wave. This has strengthen the mordern communication system. The electromagnetic radiations are divident to some types depending on their characteristics. These waves are also used for many other purpose like medical field,researches etc.

'Binary number system' is the foundation of mordern communication techology or digital electronics. Let us go to the history where the binary number system has been originated. In olden day communication there was a transducer which convert voice signal as a variable eletrical signal and transmitted to other place by wires or cable. But the strength of the eletrical signal is less it has to be amplified everytime . That time there was a search for a new technolgy that time binary number system came to existance and changed thoughts about the communication. Binary number system consist of only two numbers 1 and 0 or as per electronics on and off. In this system message signal is coaded using 1and0 or on and off .which is then transmitted through cable or using eletromagnetic radiation. In another place the coaded massage signal is us coaded into voice of video signals which are of high quality. Now a days binary numbers are also used for the working of gagets like computer.