Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Epilogue: The Pale Blue Dot
1,019 plays

Where does humanity go from here? I explain some of the massive technological trends of today, and conclude this course with an interesting realisation.

Anirudh Kanisetti
BITS Pilani (Goa), history blogger, artist, podcaster.

Unacademy user
if energy is only absorbed on ground state of hydrogen then the wavelength in absorption spectrum should always be less than 121.6 nm as it is the max. wavelength whose photon is absorbed BUT then why the hydrogen absorption spectrum shows black absorption lines between 400 nm to 700 nm as in ur video and as well as on internet
Mayank Singh
8 months ago
Mayank Singh
8 months ago
Please reply i have this doubt
I literally can not find words to describe this course, let alone the ending. By far the best course I have ever seen! By far the greates ending any course or for that matter any story can ever have. Its amazing how a BITS Pilani graduate turns into a history lover and makes us loves history too. Its been an abosulte pleasure living this journey with you, Anirudh! Waiting for more of your courses!
The pleasure is mine, Darpan! I'm so glad you liked the course. Do keep in touch! :)
Anirudh, thanks once again for this awesome course. And a great thanks for finishing this course with the famous quote of Carl Sagan from the Cosmos series. That is my favourite quote too :)
My pleasure, Rony. I must say I'm very impressed that you guessed so many of the paintings correctly. Quite an achievement. And it's always a pleasure to meet a fellow Sagan fan. Do stay in touch! :)
I have not guessed most of the paintings... I'm not a historian to do that much... I Googled to find all those paintings :) But I like learning like that, and the answers will also help others who are watching the course :)
thanks Anirudh! What an enriching experience... you are commendable and I thoroughly enjoyed every bit of the excellent pictorial representation of human history.
what the....... awesome... completely blown away !!! addictive!! started this course on 21st june 11 am .. finished on the same day at 5:13 pm i was flowing along dust of time of human history .... in the end i found out that.... I AM Grain of DUSt on the earth which itself is a mote of dust suspended in a sunbeam
So glad that you liked it, Ali! Responses like yours make me so happy that I was able to teach this to you all. :)
wonderfull presentation with pics..make my day special..sir .thanks unacademy..hard to collect those things in as simpler..
  1. Consider again that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar, every "supreme leader, every saint and sinner in the history of our species lived there on a mote of dust suspended in a sunbeam." Carl Sagan The Pale Blue Dot

  2. Welcome back! I'm Anirudh. I'm a history blogger, artist and BITS Pilani (Goa) graduate. You can find me at

  3. What's next?

  4. Understanding Tomorrow The great trends which will shape the 21st century

  5. Artificial Intelligence and Robotics: Controlling the Mind How will the job landscape change? How will humanity deal with it?

  6. Genetics and Medicine: Controlling the Body How will families and jobs change? Hydrogen O Oxygen O Nitrogen O Carbon O Phosphorus Pyrimidines Prines

  7. What shall we believe in? Is there an eternal truth? What will explain our existence? 14

  8. 2 Just think.

  9. The broad outline Middle Ages The Rise and Fall of Civilizations o CE 600s 1B00s 1400s CE 2000s CE The Great Pyramid at Giza Early High Late Renaissance Revolutions 500s BCE-20(SCE Today 2500s BCE 50oS CE Early Classi Late Enlightenment 200s 500s CE 170os CE Intiquity Colonialism

  10. You are here. Fish Earth nites Dinosaurs You are here. Billion years ago Flowers and bees