Sagan discusses the story of the Heike crab and artificial selection of crabs resembling samurai warriors, as an opening into a larger discussion of evolution through natural selection (and the pitfalls of intelligent design). Among the topics are the development of life on the Cosmic Calendar and the Cambrian explosion; the function of DNA in growth; genetic replication, repairs, and mutation; the common biochemistry of terrestrial organisms; the creation of the molecules of life in the Miller-Urey experiment; and speculation on alien life (such as life in Jupiter's clouds). In the Cosmos Update ten years later, Sagan remarks on RNA also controlling chemical reactions and reproducing itself and the different roles of comets (potentially carrying organic molecules or causing the Cretaceous–Paleogene extinction event).

This entertaining and engaging, high quality documentary film explores one of the most significant unanswered questions of our time 'Does infinity exist?' and if so, what are the implications of an infinite universe. If our universe is infinite, then what is the likelihood of other life? Could there be other civilizations just like ours or is it possible that we are the only intelligent life anywhere in our vast and likely infinite universe? Conversations with leading thinkers from multiple disciplines reveal the latest in scientific research, in this engaging and visually stunning film.

There is a battle playing out inside your body right now. It started billions of years ago and it is still being fought in every one of us every minute of every day. This is the story of a viral infection - the battle for the cell.
This film reveals the exquisite machinery of the human cell system from within the inner world of the cell itself - from the frenetic membrane surface that acts as a security system for everything passing in and out of the cell, the dynamic highways that transport cargo across the cell and the remarkable turbines that power the whole cellular world to the amazing nucleus housing DNA and the construction of thousands of different proteins all with unique tasks. The virus intends to commandeer this system to one selfish end: to make more viruses. And they will stop at nothing to achieve their goal. Exploring the very latest ideas about the evolution of life on earth and the bio-chemical processes at the heart of every one of us, and revealing a world smaller than it is possible to comprehend, in a story large enough to fill the biggest imaginations.

Narrated by Morgan Freeman, this ambitious documentary series unfolds the extraordinary story of the universe across millions of years, weaving together its deep connection to life on Earth. In the first part of the series, we offer the first three episodes, beginning with an intense exploration of the sun as a life-giving force, following one cheetah’s hunt for survival across the vast plains of the Serengeti. From there, we witness the steady pulse of the universe through the eyes of a chimpanzee, tracing life’s path from birth to a final moment of calm. Finally, we immerse ourselves in the challenging year of an Alaskan brown bear as it endures the harsh winter, emerging into the warmth and renewal of summer. Each scene offers a breathtaking glimpse into the delicate and awe-inspiring rhythms of life, nature, and the cosmos.

In the captivating second part of “Our Universe”, chapters 4 to 6 are presented together in an unmissable journey through the cosmos and life on Earth. These episodes delve deep into the elements that formed our world, the essential role of water, and the unseen forces that shape our lives. They offer an enthralling exploration of our place in the Universe. Dive in to experience this profound story of existence, from stardust to soulmates.
In the fourth chapter, we uncover how the elements essential to life were forged in the hearts of stars. Following a green sea turtle’s quest across the ocean for these elements, this episode reminds us that life is built from the remnants of ancient stars. The fifth chapter takes us back to the miraculous arrival of water on Earth, exploring how this vital substance transformed a barren landscape into a thriving blue planet. In the final chapter we witness gravity’s grand influence on life, following two king penguins as their journey of attraction and survival unfolds against the cosmic force that binds us all.

The sixth episode of the series narrates the fascinating story of the evolution and survival of life on our planet after the catastrophic event that marked the end of the era of dinosaurs, 66 million years ago. Through a visually stunning journey, we will see the impact of the meteorite and all its consequences in detail. We will also discover how the animals and plants that survived the mass extinction adapted, evolved, and diversified to fill the ecological niches left by the dinosaurs. From the first mammals and birds that emerged from the ashes to dominate the Earth, to the formation of complex ecosystems in the oceans and on land, the documentary offers a unique vision of the resilience and innovation of life on our planet.
With impressive imagery and exciting stories, it reveals how life, against all odds, thrived after one of the most devastating events in Earth's history. This documentary is a testament to the unbreakable strength of life and its ability to adapt and flourish even in the most adverse conditions.