Know About Everything

About Know About Everything

Learn interesting knowledge through great stories

Publisher

John Chrisman

Category

science

Language

en

Explicit

No

First episode

5 Sept 2024

Latest episode

17 Oct 2026

Latest episodes

85 episodes in the feed.

1. 

   17 Oct 2026

   The Science of Aging – Why Living Things Grow Old

   This episode explores aging as a complex biological process rather than a single internal clock. It explains how DNA damage, telomere shortening, protein misfolding, mitochondrial decline, epigenetic changes, cellular senescence, and chronic inflammation gradually reduce the body's ability to maintain and repair itself. The episode also looks at aging through evolution. Natural selection strongly favors traits that improve survival and reproduction earlier in life, while problems that appear later may face weaker evolutionary pressure. This helps explain why bodies are highly effective at maintenance, but not designed for perfect repair indefinitely. Another major focus is the search for healthier longevity. Scientists are studying exercise, nutrition, calorie restriction, senolytic therapies, nutrient-sensing pathways, mitochondrial function, inflammation, and cellular reprogramming. Some approaches have extended lifespan in laboratory animals, but translating those results safely to humans remains difficult. Ultimately, aging science is increasingly focused not just on lifespan, but on healthspan: extending the years people remain physically and mentally healthy. Understanding the mechanisms of aging may one day help delay multiple age-related diseases at once, even if true biological immortality remains far beyond current science.

2. 

   9 Oct 2026

   The Human Microbiome – The Ecosystem Within Us

   This episode explores the human microbiome, the vast community of bacteria, archaea, fungi, and viruses that live on and inside the body. Far from being passive passengers, these microorganisms interact with digestion, immunity, metabolism, and many other biological processes. The episode explains how gut microbes help break down food, produce useful compounds, communicate with the immune system, and influence how the body handles nutrients. It also examines how diet, antibiotics, age, environment, and lifestyle can reshape microbial communities throughout life. Another key theme is the gut-brain axis. Microbes may influence the brain indirectly through nerves, hormones, immune signals, and chemical metabolites, although many claims about microbes controlling mood or behavior are still being investigated and should be treated cautiously. Ultimately, the microbiome changes how we think about the human body. We are not isolated biological machines, but complex ecosystems living in partnership with microscopic organisms. Understanding those relationships may become increasingly important for medicine, nutrition, and personalized healthcare.

3. 

   1 Oct 2026

   The Hidden World of Microbes

   This episode explores the vast invisible world of microbes, including bacteria, archaea, viruses, and other microscopic organisms. Although microbes are often associated with disease, most are harmless or beneficial, and many are essential to life on Earth. It explains how microbes recycle nutrients, support ecosystems, influence ocean chemistry, help plants and animals survive, and form complex communities inside the human body. The human microbiome is especially important, affecting digestion, immunity, and the chemical environment within us. The episode also examines how microbes evolve rapidly, making antibiotic resistance a major challenge, while viruses influence ecosystems and even leave traces in the genomes of their hosts. Their ability to survive in extreme environments also expands our understanding of where life may exist beyond Earth. Ultimately, microbes are not a minor part of the living world. They are among its most powerful foundations, shaping health, evolution, ecosystems, biotechnology, and the chemistry of the entire planet.

Podcast Authority Score: 22 / 100

A composite of feed quality, social presence, YouTube performance and engagement. Read the methodology.

Quality

44

Social presence

0

YouTube

0

Engagement

0