Life Science Archives

What Are the 5 Koppen Climate Classification Types?

The Koppen climate classification catalogues Earth’s types of environments. In the eyes of Koppen, they are tropical, dry, temperate, continental and polar. […]

Taxonomic Classification: From Domain to Species

In biology, we categorize life by how similar organisms are with each other. Like a family tree, we find relationships by their classification of life. […]

What Are the 3 Domains of Life?

We categorize life into 3 domains of life: eukarya, archaea and bacteria. Domains classify life in the most general way such as the presence of a nucleus. […]

Cambrian Explosion: Life Diversification in the Oceans

The Cambrian explosion was the largest diversification of life in Earth’s history. Ocean life started as sparse and simple. Then, it remarkably diversified. […]

Cellular Respiration Steps: Energy Conversion in the Body

The single-most important biochemical reaction human beings need is cellular respiration. Our cells require oxygen to break down the food and provide energy. […]

What Are the 4 Levels of the Food Chain?

All living things rely on each other in the food chain. Energy transfers through living organisms from predators, herbivores, producers and decomposers. […]

The Biosphere: Life on Earth

The biosphere is the layer of Earth where life exists. You, me, plants, insects bacteria and all living things on land, air and oceans are the biosphere. […]

Nutrient Cycle: From Inorganic to Organic Material

Food for thought, the nutrient cycle constantly exchanges inorganic and organic matter back and forth in the environment. It’s just recycled back and forth. […]

Human Timeline: How Long Have Humans Existed?

The earliest anatomically modern human fossil found was dated at about 200-300,000 years old in Morocco, Africa. They had modern faces and used stone tools. […]

We Are Made of Stardust from Old Supernovas

Supernovas are the dying stage of a star when the star explodes. Heavier elements like copper and zinc get flung out into space which we find in our bodies. […]

Endosymbiosis: The Origin of Eukaryotic Cells

Endosymbiosis sparked the origin of eukaryotic cells. It’s the idea that a prokaryote engulfed a bacteria and became mitochondria part of eukaryotic cells. […]

Human Cells vs Bacteria: Microbiota in Your Body

By 10 to 1, colonies of bacteria outnumber human cells. We rely on bacteria because they break down sugars, help digest food and protect against infections. […]

Human Evolution: A Timeline of Early Hominids [Infographic]

Since about 4 million years ago, humans have evolved from early hominids to modern humans. Here are 14 species examples from human evolution now extinct. […]

What Is Biodiversity (Biological Diversity)?

Biodiversity or “biological diversity” refers to the variety or genetic diversity of species in an ecosystem. Ecosystems rely on biodiversity for resiliency. […]

Long-Term Carbon Cycle: Carbon Dioxide to Hydrocarbons

Carbon is re-purposed into fossil fuels in the long-term carbon cycle. The coal that we use today was produced millions of years ago from buried swamps. […]