We start getting older in our 30s. This does not happen to all animals. Some species of bats and rats stay young and fertile throughout their life. What goes awry with our cells? In this course, I will highlight a common denominator: aging stem cells. Some animals evade aging by creating systems that keep their stem cells young throughout their life.
Cover image credit: DALL·E-2023, Two old people using a walker to walk, Feb 4, 2023
4 Lessons - Intermediate
Electrons are fast moving particles. Yet they create seemingly solid bonds between atoms. This course will explain how very fast entities create solidity in nature.
12 Lessons - Intermediate
Hydrogen atoms join together to form a hydrogen molecule, H2, or hydrogen gas. This reaction releases energy and produces two hydrogen atoms held together by a single bond.
This course describes why each hydrogen atom's lone electron finds it much more comfortable to match up into a single bond.
9 Lessons - Intermediate
White bubbles, ice, snow, cold breath, and clouds. What makes them so white? There is a common theme to many of the white colors in water.
12 Lessons - Easy
This course highlights white color in nature.
What is the common theme between snow, splashing water, clouds, polar bear fur, white weasels (ermines), whipped egg whites, and the foam on a beer head?
Picture credit: USFWS Mountain-Prairie. Ermine. The name ermine is often used for the long-tailed weasel in its pure white winter coat. Despite their small size and cute appearance, they are very aggressive carnivores, Flickr.com, taken on March 11, 2016.
6 Lessons - Easy