Answer:
They found evidence of an impact crater in Mexico
Explanation:
The K-Pg boundary is the boundary that separates two periods, but also two eras. The two periods that are separated by this boundary are the Cretaceous and the Tertiary, while the two eras are the Mesozoic and the Cenozoic. The boundary is marked by a mass extinction, and the scientists started to hypothesize as to why it happened. There were numerous different theories, but a clue in Mexico, or rather right next to the Yucatan Peninsula, shed new light on it. The scientists found an impact crater, formed either by a large asteroid or a comet. Such an impact would have easily caused sudden and drastic changes on the Earth, killing of the majority of the species. This impact released such a big amount of energy that it killed everything in the surrounding area in seconds. On top of that, it caused an extremely hot wave of air across the whole planet, killing many more organisms. It managed to trigger most of the volcanoes to erupt, as well as the earthquakes, causing also very large tsunamis. The sunlight got blocked for quite some time from all the aerosols in the atmosphere as well. This resulted in a mass extinction of the dominant species, like the dinosaurs, but it opened up the terrain for the evolution of the others, like the mammals.
Explanation:
The <u>Khyber Pass</u> is in what is today Khyber Pakhtunkhwa province (formerly known as the North West Frontier Province) of Pakistan, near the city of Peshawar. It is a border region. What is the neighboring nation? (This map will help you.) The Khyber Pass is on Pakistan's border with Afghanistan.
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How we suppose to know Read the book
It's crucial for an engineer who is just beginning to design multi-story buildings to go logically through each stage of the design process. Below are six steps that make up this sequence.
Basic guidelines to design a multi-story building
Each stage includes general guidelines to assist the designer in rapidly and effectively coming up with a workable solution for a specific set of limitations. In order for the end result to be both logical and attractive, the designer must also understand some general principles of excellent design.
The stages of a building project are presented.
Defining a project: What it is, why it is being proposed, where it is, etc.
Putting the facts together and creating the brief - Recognizing the location and context.
Designing a scheme involves considering and creating choices and a thorough design of the numerous parts and pieces.
Drawings and specifications for construction information
Construction.
For more information on designing a multi-story building, refer to-
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