Modern Bodies

Are humans actually built for modern life?

Felicia and Ehud Ur explore how cities, technology, social media, AI, and ultra-processed food are reshaping human biology and behavior faster than evolution can keep up.

From ancient civilizations like Akrotiri and Çatalhöyük to smartphones and digital overload, this episode examines the growing mismatch between ancient human systems and modern environments.

Topics include evolutionary mismatch, sedentary lifestyles, AI and cognition, modern eating habits, social media, attention, and the hidden biological costs of convenience.

 

Follow Dr. Ur on Substack at The Great Feast or subscribe at DrEhudUr.com

Why do human females live decades after they stop reproducing? 

We take a deep dive with Dr. Ehud Ur into the grandmother hypothesis, a theory that suggests postmenopausal women played a critical role in human survival. 

In a world where child mortality was high and resources were scarce, grandmothers weren’t just helpful, they were essential. 

They gathered food, shared knowledge, reduced maternal risk, and helped raise the next generation.

We also unpack:

• Why evolution favours survival of lineages, not just reproduction
• How human babies are uniquely vulnerable and what that demanded of our species
• The hidden power of intergenerational cooperation
• Why menopause may be more like a biological switch than a system failure
• What modern society may have lost by separating generations

This episode is part science, part story and a reminder that the wisdom of those who came before us might be one of our greatest evolutionary advantages.

Follow Dr. Ehud Ur, Endocrinologist

Substack: @thegreatfeast

Website: DrEhudUr.com

 

Why do we celebrate Easter and how did we end up with bunnies, eggs, and chocolate?

In this episode of Modern Bodies, we explore the history, symbolism, and human meaning behind Easter — from ancient seasonal rituals to modern traditions.

Long before Christianity, people across different regions were already marking this time of year. The arrival of spring meant survival and the return of food, light, and life. Over time, these seasonal patterns were turned into shared rituals, symbols, and celebrations.

What is the spring equinox and why has it mattered to humans for thousands of years?

In this episode of Modern Bodies, we explore the science, history, and meaning behind the spring equinox 

Why does the equinox happen?

How did early humans track time long before calendars or clocks existed. 

What does the equinox represent and why these seasonal turning points still matter, even in a modern world where we no longer rely on them for survival.

From ancient sites like Stonehenge and Chichén Itzá to early monumental structures like Göbekli Tepe, humans have been observing and marking seasonal changes for over 10,000 years. This episode is an invitation to step outside, look up, and reconnect with the rhythms that have shaped human life for millennia.

Don't forget to subscribe so you don't miss out on what's next!

In this episode of Modern Bodies, we explore the ancient biological clock that still governs the human body. Long before electricity, cities, and digital clocks, human life was structured by light — the rising and setting of the sun, and the changing seasons across the year.

Inside the brain, a tiny group of neurons track light levels and coordinates circadian rhythms that influence sleep, hormones, metabolism, mood, and immune function. Even small disruptions to this system can affect how we feel.

Daylight saving time may seem like a simple clock change, but it briefly pushes millions of people out of sync with a biological system that evolved over hundreds of thousands of years.

We’ll explore how humans historically lived by seasonal rhythms, why winter and spring shaped human activity in the past, and how ancient societies began marking the movement of the sun through rituals and calendars.

Because before time was mechanical, it was ecological.

And understanding that ancient relationship between humans, light, and the seasons helps explain why a one-hour shift in the clock can still throw our bodies off today.

Don't forget to follow subscribe to make sure you never miss out on new episodes!

How do we actually know what early humans ate?

There are no photographs from two million years ago. No written records. No preserved daily menus. What we have are fragments: stone tools, fossilized bones, and teeth.

In this episode of Modern Bodies, we explore how archaeologists and paleoanthropologists reconstruct the prehistoric world using surviving evidence. From 3.3-million-year-old stone tools discovered in Kenya to dental microwear patterns that reveal diet, we unpack how scientists interpret the archaeological record — and what that record leaves out.

Because the past does not preserve itself evenly.

Wood decays. Fibres disappear. Only certain materials survive, which means our understanding of early humans is shaped by durability, not importance. When rare wooden tools dating back hundreds of thousands of years are discovered, they expand our understanding of early ingenuity beyond stone and hunting.

Follow @modernbodiespod on instagram or on Substack 

For decades, the story of human evolution has centered on hunters, weapons, and conquest. But what if the real engine of our survival has been hiding in plain sight?

In this episode of Modern Bodies, we turn toward the overlooked labor that sustained our ancestors — the steady, skilled, and deeply strategic work that fed communities, protected children, and shaped the very structure of human society. We explore why gathering may have mattered more than we’ve been told, how cooperation transformed our species, and why one of the most misunderstood stages of a woman’s life might hold a surprising evolutionary clue.

Because you can’t tell the story of how humans became human without telling the story of women.

For most of human history, we weren't just hunters, we were foragers, scavengers, gatherers, and opportunists.

In this episode, we challenge the dramatic hunter narrative and look at what foraging actually looked like. You'll learn why gathering was the foundation of survival, how scavenging likely came before hunting, and what modern foraging populations like the Hadza reveal about human flexibility and adaptation.

This isn't about diet advice. It's about understanding the incomplete story we've been told and what the real story reveals about how humans became human.

Get involved in the conversation on Substack 

Don't forget to subscribe so you don't miss out on what's next.