Maya gods and religion
For the Maya gods, a Maya pyramid at Tonina (ca. 700 AD) A Maya creation story Maya people believed that the world was created by One Deer. One Deer created [...]
For the Maya gods, a Maya pyramid at Tonina (ca. 700 AD) A Maya creation story Maya people believed that the world was created by One Deer. One Deer created [...]
Hinduism: Arjuna fighting Karna, with Krishna as his charioteer (Duttapara Temple, ca. 1500s AD) What does "Hindu" mean? The word Hindu comes from the river Indus. So it just means [...]
Coelocanth: a fish from the Devonian period When was the Devonian period? Four hundred and sixteen million years ago, when the Silurian period ended and the Devonian period began, most [...]
Volcano erupting When was the Cretaceous period? During the Cretaceous period, beginning about 145 million years ago, the continents continued to drift away from each other. Plate tectonics Back to [...]
Wild sunflowers or Black-Eyed Susan flowers Where do sunflowers grow wild? Sunflowers grew wild all over North America. From the Paleo-Indian time on, many different groups of people picked sunflowers and [...]
Daffodil with petals and pistil in the middle. Take a long walk around your neighborhood and the park in the late spring and look at all the flowers you see. [...]
Flowering plants: Lavender flowers smell wonderful! Before there were flowers... For millions of years, the Earth was covered with ferns and pine trees and moss and mushrooms, without any flowers, grass, [...]
Evolution of seeds: Dandelion seeds What is a seed? A seed is the egg cell of a plant, with a hard wrapper around it so it can survive on its [...]
Cell division The very earliest photosynthesizing plants on Earth, about 3 billion years ago, had only one cell, and they reproduced the way most one-celled creatures do, by mitosis: splitting [...]
Human sperm cells with flagella (under a microscope) - They're haploid cells. When a cell divides by meiosis, it ends up with only half the amount of DNA it had before. [...]