In May 1985, Gorbachev gave a speech in Leningrad in which he admitted the slowing of economic development, and inadequate living standards. Gorbachev and his team of economic advisors then introduced more fundamental reforms, which became known as perestroika (restructuring).
The mesosaur fossils found on the South American and African continents are explained most easily if the mesosaur swam from one continent to the other.
The two items common in Europe did the conquistadores introduce to the people of Mesoamerica and South America are horses and wagons. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.