Image of a research laboratory and test tubes.
Biology

The Study of Genetics: The Story of Crossbreeding Plants

August 25, 2020

The subject of genetics is huge, it studies the evolution of humans through parental traits and their relation with various species. Does the study also help in knowing how crossbreeding can result in a variety of different plants? […]

Picture showing a scientist conducting tests on different vegetables.
Biology

Genetically Modified Organisms: Benefits and Concerns

August 5, 2020

Genetically modified organisms are useful for farmers as plants can be modified to keep insects away and increase the yield. Being so beneficial for foods, why are most people concerned about GMOs used in animals and plants? […]

Engineering

The Science of Flight—Breaking the Sound Barrier and Beyond

September 15, 2017

During and just after World War II, the quest for ever faster fighter planes reached an apparent natural barrier—the speed of sound. Yet, on approaching this limit, aircraft became unstable and uncontrollable. In this full lecture, discover how a new approach to aircraft design solved the problem of compressibility and shock waves in this transonic region, paving the way for supersonic flight and paved the way to breaking the sound barrier. […]

Engineering

Alternating Current vs. Direct Current—What’s The Difference?

June 21, 2017

Examine the nuances of alternating and direct currents, see how transformers use electromagnetic induction to transform voltage levels in AC circuits, and observe the role of diodes and capacitors in regulating current. See how the DC power supplies that charge our cell phones are constructed so that they convert alternating to direct current. […]