Daily Content Archive
(as of Friday, April 26, 2019)| Word of the Day | |||||||
|---|---|---|---|---|---|---|---|
headliner
| |||||||
| Daily Grammar Lesson | |
|---|---|
Defining the Past Perfect Continuous TenseThe past perfect continuous tense (also called the "past perfect progressive tense") is used to describe an action that began and was still in progress in the past before another past action started. What do we usually use the present perfect continuous tense to emphasize? More... | |
| Article of the Day | |
|---|---|
 RetrovirusesA retrovirus is a type of RNA virus that reproduces itself by transcribing its DNA into the genetic material of the host cell. These viruses are therefore used as vectors by genetic engineers to import foreign DNA into certain cells. Retroviruses sometimes destroy the cells whose DNA they alter, as with HIV, and sometimes cause them to become cancerous, as with the viruses that cause certain leukemias. What enables retroviruses to rapidly develop resistance to antiviral drugs? More... | |
| This Day in History | |
|---|---|
 Nuclear Reactor at Chernobyl Plant Explodes (1986)The accident at the Chernobyl nuclear power plant is regarded as the worst nuclear accident in history. Radioactive debris from the disaster drifted across parts of the western Soviet Union and Europe. Large areas of Ukraine, Belarus, and Russia were badly contaminated, resulting in the resettlement of hundreds of thousands of people and a disputed number of deaths. The incident set off an international outcry over the dangers posed by radioactive emissions. What caused the accident? More... | |
| Today's Birthday | |
|---|---|
 John James Audubon (1785)Audubon was a US ornithologist and artist known for his drawings and paintings of North American birds. After failing in business, he concentrated on compiling his extraordinary four-volume Birds of America, published between 1827 and 1838. Though his bird poses are sometimes unrealistic—the result of painting dead birds wired into position—and some details are inaccurate, his studies were fundamental to New World ornithology. How many bird species are featured in Birds of America? More... | |
| Quotation of the Day | |
|---|---|
 Considering how foolishly people act and how pleasantly they prattle, perhaps it would be better for the world if they talked more and did less.W. Somerset Maugham (1874-1965) | |
| Idiom of the Day | |
|---|---|
inch-perfect— Extremely accurate; very well placed or perfectly judged. (Used especially of maneuvers, moves, or shots in sport.) Primarily heard in UK. More... | |
| Today's Holiday | |
|---|---|
John Audubon Day (2024)John James Audubon (1785-1851) was America's foremost ornithological illustrator. After his death in 1851, Audubon's wife Lucy returned to teaching to support herself. One of her students, George Bird Grinnell, in 1886 organized the Audubon Society for the study and protection of birds. Today there are many branches of this organization, known as the National Audubon Society, and its members honor Audubon on his birthday, April 26. In some states, Audubon Day and Arbor Day are celebrated together by planting trees in bird sanctuaries. More... | |
| Word Trivia | |
|---|---|
Today's topic: inhabitantinfernal - An inhabitant of the underworld can be called an infernal. More... sherpa - Literally means "inhabitant of an eastern country." More... aborigine - From Classical Latin meaning "ancestors," it was spelled with a capital A as the name of the primeval Romans; the first people called aborigines were the original inhabitants of Italy and Greece and aborigine was specifically applied to the inhabitants of a country ab origine, "from the beginning." More... sylvans - Natives or inhabitants of forests or woods. More... | |