This comprehensive article provides information about the physical properties of water, the importance of water as an Earth material, the processes and cycles that water undergoes on Earth, its importance to life on Earth, and why we...

DNA is the molecule of life, as life's secrets are encoded in DNA. In this interactive activity. we see the famous double helix structure of DNA.

Online biology textbook discussing the chemical nature of water, and the importance of its molecular structure to life. Also discusses at length the organic molecules nucleic acids, proteins, lipids, and carbohydrates.

The sun's energy is the primary source of energy for all surface phenomena and life on Earth. Combined with the material of the Earth (including the molecules held close by the Earth's gravitational force called the atmosphere), this...

The sun's energy is the primary source of energy for all surface phenomena and life on Earth. Combined with the material of the Earth (including the molecules held close by the Earth's gravitational force called the atmosphere), this...

This is a brief biography on the life and scientific work of Otto Stern, a physicist honored with the Nobel Prize in physics for his "development of the molecular ray method and his discovery of the magnetic moment of the proton."

Investigate breakthroughs in stem cell research, and explore the structure and function of a DNA molecule. Create a model of a DNA from tagboard.