NCW Libraries

Investigate nuclear fission, in which a heavy, unstable nucleus breaks apart; and nuclear fusion, where light nuclei are joined. In both, the released energy is millions of times greater than the energy from chemical reactions and comes from the conversion of nuclear binding energy to kinetic energy.

At this legendary site, reconstruct the sequence and rituals of a visit to the oracle in ancient times. Enter the lower sanctuary, making offerings en route to the temple, with its dual warnings to the pilgrim, where the Pythia (priestess) speaks for the god in answer to each seeker's question.

Often grouped together with other mindful practices, Dr. Bauer dedicates an entire lecture to moving meditation, including yoga, tai chi, and qi gong. Although these methods have existed for thousands of years, the scientific benefits of integrating these practices into modern Western healing have just recently begun to emerge.

The next organ system you focus on: the metabolic system. Discover how cycles of chronic stress lead to a persistent activating and storing of energy, which in turn can lead to an inefficient use of energy and play a critical role in the prevalence of adult-onset diabetes.

Travel to the Roman province of Judea, where a humble carpenter has entered Jerusalem during the Passover. The city is seething with political and religious discontent, and Jesus is seen as a troublemaker. Witness his arrest and interrogation by the priests and Pontius Pilate, and consider Pilate's decision to put Jesus to death.

Essays that present conflicting views are not uncommon; Socrates would commonly switch sides in order to test all parts of an argument, and many others have followed his example. Learn how writing essays that provide both sides of an argument can help you to develop an elasticity of mind, expand your essay's range of ideas, and add to your ethos or credibility.

Hubble's image of the nearby galaxy NGC 3370 includes many faint galaxies in the background, exemplifying the telescope's mission to establish an accurate distance scale to galaxies near and far: along with the related expansion rate of the universe. Discover how Hubble's success has led to the concept of dark energy.

Charting the motions and changes of the sun and moon may be humankind's oldest astronomical activity. Discover how both objects offer rich opportunities for study. Also learn the precautions to take when observing the sun, which is the only star that can be seen up close and in detail.

In this lesson, learn some key tips and tricks for making sure you purchase only the freshest, highest-quality seafood. Then, improve your confidence with handling seafood by following recipes for ceviche, a roasted whole fish with fennel, and Prince Edward Island mussels in a creamy broth.

Why just watch robots when you can understand how they actually work? Deconstruct a Roomba to learn the five functional categories of parts all robots need. Then, explore a universal lesson about robotics: because robots can't do everything well, trade-offs (such as simplicity versus maneuverability) are always involved.