Answer:
- the first direct detection of gravitational waves came in 2015
- gravitational waves are predicted to travel through space at the speed of light
- the existence of gravitational waves is predicted by Einstein's general theory of relativity
Explanation:
The gravitational waves are waves that are produced by the objects, and depending on the mass of the object they can be stronger or weaker in their influence.
These waves have been in the minds of the scientists for more than a century now, with Einstein predicting them in his theory of relativity. The only problem with these waves was that there was no proof of them. The proof finally came in 2015 when these waves were detected from the first time, with two black holes to be thanked for that as they were the source of them.
These waves are predicted to be able to travel with the speed of light through space when they have small amplitudes.
The borders of Latin America as a region have changed only in the northern part, while the inner borders of Latin America have experienced lot of changes.
Explanation:
Latin America is a region where the Spanish and Portuguese language and culture predominate in the Americas, which has been achieved through the Spanish and Portuguese explorations and conquests. This comprises the territories from Mexico in the north, throughout Central America and part of the Caribbean, and almost all of South America. The Spanish and the Portuguese were the first Europeans to colonize the Americas, so naturally they managed to have a lasting impact.
- The borders of Latin America as a region have only changed in its northern part, as in the past parts of the southern US, the Midwest, and the West of US have been part of this region. That has changed with the expansion of the US, so the northern border has been set at the US - Mexico border.
- The internal borders though, have changed much more. Central America has been divided into numerous small nations. In South America. some, like Brazil and Argentina have remained mostly the same, but on the other internal divisions have been formed several different, smaller nations.
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I assume that it's a hominid fossil - since it has tools and mostly only hominids are found to use tools (although birds are also known to use tools).
It could be Homo erectus, which lived between 2 million years ago and 70 000 years ago, but more likely it's homo habilis, which lived from 2.5-1.5 million years ago.
Bread is a non living thing because it is processed and went through a deep process to be bread