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>The answer would be interest groups. Interest group, also named as special interest group. This is any connection or relation or association of persons or organizations, usually officially organized, that, on the foundation of one or more communal concerns that efforts to effect on public rule in its approval.</span>
"Do not take this medication with grapefruit juice." is a priority for this patient.
temsirolimus : what it means?
The medication torisel is used to treat people with the following cancers: highly developed renal cell carcinoma (a kidney cancer). "Advanced" indicates that the cancer has spread;
carcinoma of the mantle cell (a cancer of B cells, a type of white blood cell). When alternative therapies have failed or the lymphoma has returned after earlier therapy, adults are prescribed torisel.
Since Torisel is a medication used in rare disorders, it has been categorized as a "orphan medicine" on multiple occasions.
Temsirolimus is the active ingredient in torisel.
to know more about temsirolimus
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Taking Accountability of actions actually reflects the maturity of a person, and reflect their desire to talk about the conflict, and negotiate peace between them. Thus, acceptance of responsibility creates an open channel of communication, which is honest, constructive and understanding
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