Scientists on the BICEP and Planck missions are attempting to solve a mystery about the earliest moments of our universe, by searching for patterns in the Cosmic Microwave Background (CMB). If successful, the missions will help to answer the biggest question anyone can ask: how did our universe begin?

The human brain is the most complex object we’ve discovered in the universe, and every day much of its neural circuitry is taken up with the tens of thousands of decisions we need to make. ‘How do I decide?’ is a journey through the unseen world of decisions, and how they get made. Decisión-making is what allows us to navigate a course through life. Discover how important emotions are in making decissions and, as we learn more about our own brains, we can break away from slavery to our impulses. Neuroscience shows that you're made up of multiple competing drives and by understanding how choices battle it out in the brain, we can learn how to make better decisions.

Sir David Attenborough investigates whether the world is heading for a population crisis. While much of the projected growth in human population is likely to come from the developing world, it is the lifestyle enjoyed by many in the West that has the most impact on the planet. Sir David examines whether it is the duty of individuals to commit not only to smaller families, but to change the way they live for the sake of humanity and planet Earth.

At 4.6 billion years old, the Solar System is our solid, secure home in the Universe. But how did it come to be? In this episode we trace the system's birth from a thin cloud of dust and gas. Shocked by a nearby supernova, the pull of gravity and natural rotation spun it into a flat disc from which the Sun and planets coalesced. It all happened in the space of 700 million years, during which the planets jockeyed for position, dodging the Late Heavy Bombardment of deadly asteroids and setting into the neat, stable system that we now realize might be a rarity in the universe.

The documentary, an own production, immerses the viewer in a journey that blends science and philosophy, questioning the nature of time and unveiling a 4-dimensional universe, where space and time are integrated. We are invited to consider a universe in which past, present, and future coexist, suggesting that our linear perception of time might be more of a mental construction than a physical reality. The narrative progresses by exploring how quantum particles exist in states of probability until they are observed, at which point they acquire defined properties. Then, the provocative hypothesis is presented that observation also fixes the temporal dimension of the particles.
The sensation of the flow of time and the distinction between past, present, and future are introduced as mental constructions, arising from the human brain's limited capacity to process the complexity of reality. It is then proposed that the mind, by observing itself, fixes itself in the temporal dimension, thus creating the illusion of the present. Finally, the impact of these theories on free will is discussed.
This documentary challenges viewers to look beyond their everyday perceptions and consider the possibility that reality is much more complex and fascinating than our immediate experiences suggest. It is an invitation to explore the limits of science, philosophy, and the mind itself in search of answers to some of the deepest questions of existence.
More information on https://www.javier-serrano.blog/Ciencia/representacion_tridimensional_del_universo.php

Time travel is not forbidden by the laws of nature, but to build a time machine, we would need to understand more about those laws and how to subvert them than we do now. And every day, science does learn more. In this film Horizon meets the scientists working on the cutting edge of discovery - men and women who may discover how to build wormholes, manipulate entangled photons or build fully functioning time crystals. In short, these scientists may enable an engineer of the future to do what we have so far been only able to imagine - to build a machine that allows us travel back and forward in time at the touch of a button. It could be you! Science fiction? Watch this film.