iPhone Screenshots


You don't need to invent the time machine to make sent yourself back in time! "Sagan Calendar" tells about the history of the Universe in 3D format! You will learn the most interesting scenes in history of our Universe and explore amazing 3D models of planets, stars, galaxies, dinosaurs, birds, plants and people

★ Over 20 magnificent 3D models
★ High quality photo and video
★ Detailed description of each scene
★ Interesting cases
★ Language: English, Russian

The app based on the famous book "The Dragons of Eden" by an American astrophysicist and science popularizer Carl Sagan. He created a scale in which the lifetime of the Universe is mapped onto a single year. There are almost 475 years per second at this scale.

By moving along the timeline you will take an extraordinary journey to the past and will see the most remarkable scenes of history of the Universe from the Big Bang to skyscrapers construction!
All the scenes have pictural descriptions; there are a lot of photo, video and 3D materials related to corresponding scenes.

The most important stages of the Universe history with amazing 3D models are presented in the app:
•Bing Bang
•Galaxies formation
•Solar System formation
•Milky Way Galaxy formation
•Origin of life on the Earth
•Atmosphere formation
•First photosynthetic organisms
•First eukaryotes
•First worms
•First fish and insects
•First animals and amphibians
•First trees
•First flowers
•First reptiles
•Dinosaurs’ extinction
•First mammals
•First birds
•First primates
•First hominids
•First humans
•Skyscrapers and others!

★VIDEO: http://youtu.be/XZWwFtrfEOo

★FACEBOOK: http://www.facebook.com/oscteam.llc

★TWITTER: https://twitter.com/OSCteam_LLC

Ratings and Reviews

3.2 out of 5
12 Ratings

12 Ratings

RachelLynnCall ,

Worth the free download

It offers some elementary type information. I like the app since I'm new to learning about science. I was brainwashed for years believing in the creation theory. It's worth the free download.

Kc184959693727 ,

Evolution is stupid.

Question: have any of y'all evolutionist observe a KIND of animal ( not species an example of a KIND of animal: dogs, birds, pigs, horses, cows, etc.) turn into a different KIND of animal?

Don't say fossils prove it happened. If you find a bone in the dirt all you know is that that animal died. You can't prove
that it had any kids and especially kids that were a different KIND.

Science: things that can be observed tested, and demonstrated.

There are six deferent definitions of evolution and only only one of the definitions is science. The rest are purely religious speculation.

The definitions:

Micro-evolution - variations within a KIND( this one is science)

Macro-evolution - a KIND of animal turning into a different KIND of animal.

Cosmic evolution - the Big Bang.

Stellar evolution - the formation of stars. (This one is impossible because the more compressed the gas gets by gravity the hotter it gets, and when you heat up a gas it expands and all the gas needed in order for the star to form will dissipate before the star can be hot enough for fusion to occur)

Chemical evolution- the process from hydrogen to all the higher elements in the stars.( this one is also impossible because atoms can't fuse past iron)

Biological evolution( I think that's what it's called)- the theory that all life evolved from a rock.

Uchiha 312 ,


This app gives an extremely simplified timeline of the universe, with animated models. Would be awesome if it were more detailed!
The app is fine, although you must make purchases to see most of earth's timeline.

Kc's review is hilarious, as none of what they say is scientific. What exactly is a "kind"? Butthurt creationists.


Online Science Classroom, LLC
50.7 MB

Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.


English, Czech, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish

Age Rating
In-App Purchases
  1. Full version $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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