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.
The Feldhofer cave skeleton was correctly interpreted as a probable ancestor to modern humans, according to Thomas Henry Huxley.
Physical characteristics of Homo sapiens included a tall, rounded ("globular") skull and a relatively narrow pelvis. skull and pelvic geometry measurements can reliably distinguish modern humans from Neanderthals. Neanderthal fossils show a long, low skull and a wide pelvis.
The main argument that Neanderthals adapted to the cold is based on the size and shape of their sinuses, and the size and shape of their bodies.
Neanderthal genes are now present in some humans' DNA and tend to influence immune system function, hair, and skin characteristics such as hair color, tendency to go bald, and ability to tan. says, Capra. Neanderthals may have used their hands differently than humans.
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I think its d all of the above
Answer:
what am I supposed to be looking at
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Waste is radioactive and safe disposal is very difficult and expensive
Local thermal pollution from wastewater affects marine life
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