The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago. For many years, paleontologists believed this event was caused by climate and geological changes that interrupted the dinosaurs’ food supply. However, in the 1980s, father-and-son scientists Luis (1911-88) and Walter Alvarez (1940-) discovered in the geological record a distinct layer of iridium–an element found in abundance only in space–that corresponds to the precise time the dinosaurs died. This suggests that a comet, asteroid or meteor impact event may have caused the extinction of the dinosaurs. In the 1990s, scientists located the massive Chicxulub Crater at the tip of Mexico’s Yucatán Peninsula, which dates to the period in question.
Dinosaurs roamed the earth for 160 million years until their sudden demise some 65.5 million years ago, in an event now known as the Cretaceous-Tertiary, or K-T, extinction event. (“K” is the abbreviation for Cretaceous, which is associated with the German word “Kreidezeit.”) Besides dinosaurs, many other species of mammals, amphibians and plants died out at the same time. Over the years, paleontologists have proposed several theories for this extensive die-off. One early theory was that small mammals ate dinosaur eggs, thereby reducing the dinosaur population until it became unsustainable. Another theory was that dinosaurs’ bodies became too big to be operated by their small brains. Some scientists believed a great plague decimated the dinosaur population and then spread to the animals that feasted on their carcasses. Starvation was another possibility: Large dinosaurs required vast amounts of food and could have stripped bare all the vegetation in their habitat. But many of these theories are easily dismissed. If dinosaurs’ brains were too small to be adaptive, they would not have flourished for 160 million years. Also, plants do not have brains nor do they suffer from the same diseases as animals, so their simultaneous extinction makes these theories less plausible.
<span>An example can be “Kate is shocked to
hear that her best friend Mary, apparently a very honest individual, cheated on
a physics question".</span>
The term cognitive
dissonance in the study of psychology is used for the psychological disturbance
experienced by an individual who at the same time have two or more ideas,
concepts or values which are contradictory to each other.
Answer:
they offered workers the opportunity to earn higher wages.
Explanation:
In the event that farming is the foundation of the economy, industry is the vitality. The quick improvement of capital merchandise businesses advance the development of farming, transport and correspondence. It likewise empowers the nation to deliver an assortment of customer merchandise in enormous amounts and at low expenses.
Workers were attracted to industrial cities because they offered workers the opportunity to earn higher wages.
Answer:
if this is a crossword clue, i think that the answer is "yreka."
if it isnt from a crossword, i am sorry!
