2025 » The Learning Hub

Laminar Flow

Laminar flow is the smooth, organized movement of blood in layers inside a vessel. Instead of swirling or mixing randomly, the blood glides forward in neat “sheets.” The layer at the center moves the fastest, while the layers closer to the vessel wall move slower because of friction.

Celestial Narratives

How Calendars Shaped Christmas: When Humans Tried to Cage Time

December 25 exists because humans tried to trap the motion of the heavens… and almost failed. The Sun does not check a calendar. The Earth does not pause at midnight. The stars do not care that a year has ended. What we call time is not something we discovered.

Celestial Narratives

The Star of Bethlehem: Astronomy v Symbolism

On a quiet night more than two thousand years ago, a light in the sky became a story that would echo through centuries. It was not loud.It did not blaze…

Astronomy & Space

Constellation Dorado — The Cosmic Swordfish

Unlike many ancient constellations tied to Greek and Roman myths, Dorado is a modern constellation, introduced in the late 16th century by Dutch navigators exploring the Southern Hemisphere. Its name, “Dorado” or “golden,” refers to the golden fish, possibly the dolphinfish, popular among sailors in the South Seas.

Medicine

Margination of Cells

When there is injury or infection, your body widens the blood vessels in that area to allow more blood flow. But ironically, widening the vessels actually slows down the flow. When there is injury or infection, your body widens the blood vessels in that area to allow more blood flow. But ironically, widening the vessels actually slows down the flow.

Astronomy & Space

The Habitable Zone

The Habitable Zone is the distance around a star where a planet is just right for water to exist as a liquid on its surface. Not boiling away. Not frozen forever. We call it many names: The Goldilocks Zone (not too hot, not too cold) The Life-friendly Zone The Water Zone

Astronomy & Space

Red Dwarfs – The Quiet Fires of the Universe

A red dwarf is a small, relatively cool star that shines with a dim red light. In terms of size, it’s only about 7% to 50% the mass of our Sun. That means if our Sun were a basketball, a red dwarf might be the size of a golf ball. Their “red” color comes from their cool surface temperatures — usually around 2,000 to 4,000°C.