Mary Bagley

Reference The four fundamental states of matter are solid, liquid, gas and plasma, but there others, such as Bose-Einstein condensates and time crystals, that are man-made.

Reference Gases are a state of matter with no fixed shape or volume. They have a lower density than solids and liquids.

Reference Marie Curie was a physicist and chemist and a pioneer in the study of radiation.

Picturesque Mount St. Helens erupted on May 18, 1980 and remains the most destructive example of volcanic activity in the United States.

On the Big Island of Hawaii, one of the world's most active volcanoes has been spewing lava since 1983.

The only active volcano on mainland Europe is famous for destroying the cities of Pompeii and Herculaneum.

The eruption of the Krakatoa volcano in 1883 was one of the most deadly in modern history.

Mount Etna is Italy's largest active volcano. It is also the volcano with the longest record of continuous eruption.

A dramatic burst of evolutionary change, called the Cambrian Explosion, occurred during this period.

The Precambrian was the first super eon of Earth’s history, lasting from about 4.6 billion to 542 million years ago.

Liquid is a state of matter between solid and gas. Molecule are farther apart from one another, giving them space to flow and take on the shape of their container.

Solid is a state of matter in which the molecules are packed closely together and usually arranged in a regular pattern. A solid object has a fixed shape and volume.

In many ways, the history of civilization is the history of chemistry. Humans have always sought to identify, use and change the materials in our environment.

Jane Goodall is a primatologist most known for her long-term study of wild chimpanzees in Tanzania.

Did you know that Easter eggs are wonderful materials for fun science projects? Try some of these eggs-periments and find out how interesting your eggs can be!

Brightly colored materials in your kitchen can be used to make natural dyes for Easter eggs.

The Devonian Period occurred from 419.2 million to 358.9 million years ago. It is often known as the “Age of Fishes."

These simple plant science experiments will sharpen your little ones’ interest in seeds and plants.

The Silurian Period occurred from 443 million to 416 million years ago. It was a time of great environmental changes on Earth and saw the first evidence of life on land.

The Triassic Period occurred between 251 million and 199 million years ago. It was a time when life outside of the oceans began to diversify.

The Permian Period lasted from 298.9 million to 251.9 million years ago. Two groups of animals that dominated the period would later branch into mammals and reptiles.

The Quaternary Period is a geologic time period that encompasses the most recent 2.6 million years — including the present day.

Louis Pasteur was a French chemist who proved that germs cause disease, developed vaccines for anthrax and rabies and created the process of pasteurization.

Here are some fun ways to demonstrate principles of fluid dynamics.

Is Christmas too slow in coming? Why not liven things up with a little fun and interesting science? These activities are sure to while away some of those holiday doldrums.