“Zero to Birth: How the Human Brain Is Built” with Professor William Harris

Zero to Birth reviewed on Bridging the Gaps

A single fertilised egg generates an embryo. Different cell types in this embryo develop into various organs of a new human being, including a new human brain. Everything starts with a single fertilised egg, and in the embryo, some embryonic cells develop into neural stem cells that construct the brain. By the time a baby is born, its brain is already made up of billions of precisely designed neurons that are connected by trillions of synapses to form a small, compact but incredibly powerful supercomputer. In his recent book “Zero to Birth: How the Human Brain Is Built” pioneering experimental neurobiologist professor William Harris takes the reader on an incredible journey to the very edge of creation, from the moment an egg is fertilised to every stage of a human brain’s development in the womb — and even a bit beyond. In this episode of Bridging the Gaps, I speak with Professor William Harris the process of how the brain is built.

William Harris is professor emeritus of anatomy at the University of Cambridge. He is the coauthor of Development of the Nervous System and Genetic Neurobiology and the co-editor of Retinal Development. He is a fellow of the Royal Society.

We begin by examining the evolutionary history of the brain, which spans billions of years and in the Proterozoic eon, when multicellular animals first descended from single-celled organisms, and then we discuss how the development of a fetal brain over the course of nine months reflects the brain’s evolution through the ages. We discuss the emergence of first neural stem cells and how the formation of the neural plate and then its progress to the neural tube give the first glimpses of the development of the brain in an embryo. We discuss in detail how cells divide and create neural stem cells and then how these stem cells start producing neurons. A fascinating topic that we then cover is how individual neurons form connections with other neurons. Professor Harris explains how comparative animal studies have been crucial to understanding what makes a human brain human, and how advances in science are assisting us in understanding many qualities that don’t manifest until later in life. This has been a fascinating discussion on an intriguing topic.

Complement this discussion with The Spike: Journey of Electric Signals in Brain from Perception to Action with Professor Mark Humphries and then listen to The Self-Assembling Brain” and the Quest for Artificial General Intelligence with Professor Peter Robin Hiesinger

By |October 15th, 2022|Biology, Neuroscience, Podcasts, Research|
Read More

“The Next 500 Years: Engineering Life to Reach New Worlds” with Professor Christopher Mason

We are the only known species that understands species go extinct. We also understand that climate calamity, apocalyptic war, or the demise of the sun in a few billion years will all inevitably bring life on Earth to an end. So it is extremely important we do whatever we can to avoid extinction. We have a moral obligation to prevent extinction, and we have a responsibility to act as life-form shepherds—not just for our species, but for all species on which we rely, as well as those yet to come. This may involve finding a new home planet, developing innovative ways to undertake long haul space journeys. This may also involve re-engineering life and human genetics for travelling to, and for surviving on other worlds. Dr Christopher Mason argues in his provocative and engaging book “The Next 500 Years: Engineering Life to Reach New Worlds” that we have a moral duty to do just that. In this episode of Bridging the Gaps I speak with Dr Christopher Mason and we discuss his inspiring vision of the next 500 years of spaceflight and human exploration.

Dr Christopher Mason is a professor of genomics, physiology, and biophysics at Weill Cornell Medicine and the Director of the WorldQuant Initiative for Quantitative Prediction. He is a geneticist and computational biologist who has been a Principal Investigator and Co-investigator of 11 NASA missions and projects.

We start by discussing the moral obligation, moral duty that we must protect our species against extinction and to ensure that life continues. We discuss the impact of living in hard and unfamiliar environment of space on the human body and talk through the findings of “the Twin Study” which examines the impact of nearly a full year in space on astronaut Scott Kelly, using his identical brother Mark as control. We then discuss moral and ethical dimensions of engineering life and making changes in human genome and undertaking genetic modifications of humans. We review the 500 years plan that Dr Chris Mason presents in this book and go through various phases of this plan. We talk about engineering of genomes, cellular engineering, synthetic biology and preparing humans for long haul space flights. We discuss in detail how CRISPR tool works and what it enables us to do. We also discuss feature and functional re-engineering of the human genome by borrowing features and functions from other species. We once again touch upon moral, ethical, and social implications of re-engineering life and try to imagine a future full of variety of life forms evolved through directed and iterative re-engineering of life, coming from the same source that is human.

Complement this discussion with The End of Astronauts”, Robotic Space Exploration and Our Future on Earth and Beyond with Professor Martin Rees and then listen to “Nano Comes to Life”: DNA NanoTech, Medicine and the Future of Biology with Professor Sonia Contera

By |May 19th, 2022|Biology, Future, Physics, Podcasts, Research|
Read More

“The Joy of Science” with Professor Jim Al-Khalili

Can living scientifically empower us to navigate the complexities of today’s complex and unpredictable world? Can the joy of critical thinking and the effectiveness of the scientific method assist us in making better decisions? Can living a more rational life help us navigate modern life more confidently? In his new book “The Joy of Science” acclaimed physicist Jim Al-Khalili invites readers to engage with the world as scientists have been trained to do. He shows how the fundamental principles at the heart of scientific thinking, as well as the scientific process, are profoundly relevant to the perplexing times we live in and the tough choices we make. In this episode of Bridging the Gaps, I speak with professor Jim Al-Khalili and we thoroughly discuss very interesting and deeply intriguing ideas that he presents in this book.

Professor Jim Al-Khalili is a theoretical physicist at the University of Surrey where he holds a Distinguished Chair in physics as well as a university chair in the public engagement in science. He is a prominent author, broadcaster and one of Britain’s best-known science communicators.

I start our discussion with the question that how the discipline of science should be perceived. We acknowledge that there are many ways scientific work is carried out in many different disciplines. We discuss the issue of “relative truth” and how biases held by individuals impact their opinions and distort their view and lead them to their own version of truth. We explore how science deals with the issue of relative truth. We probe how the scientific method enables us to continue researching in the presence of uncertainty. We investigate the impact of misinformation and disinformation on the disciple and cause of science. We also touch upon how rational humans can become; can we think rationally only up to certain point. We discuss in detail how scientific information should be presented to policy makers that should enable and empower them to make better decisions and to make the right choices. Finally, I ask Professor Jim Al-Khalili to tell us about his research in the field of open quantum systems. This has been a fantastic discussion.

Complement this with Asking Better Questions for Creative Problem Solving, Innovation and Effective Leadership with Hal Gregersen and then listen to On Public Communication of Science and Technology with Professor Bruce Lewenstein

By |May 13th, 2022|Biology, Future, Information, Knowledge, Physics, Podcasts, Research, Technology|
Read More