And that's made it hard for them to trace the history of maize. Now, scientific theories about the origins of maize first started coming out in the 1930s. One involved a plant called teosinte. Teosinte is a tall grass that grows wild in certain parts of Mexico and Guatemala. When resear...
He has various world saving projects:from preventing the extinction of the Chiricahua leopard frog in the wilds of New Mexico to founding an influential nuclear non-proliferation institute.Turner really does seem to see himself as locked in a personal battle against apocalypse.He doesn't just giv...
根据第三段3,4行In Mexico, there is a history of hard life, fighting over land, and loss of homes. Mexicans are more likely to see struggles as part of their life and unavoidable.说明墨西哥人在有困难的历史,他们会把斗争作为生活中不能避免的一部分。而美国人的思想是很开放的,在墨西哥人看来,...
According to Aztec legend, the people who founded Tenochtitlan in the year 1345 had migrated from a cave in the northwest desert of Mexico to Lake Texcoco. During the journey, Aztec priests carried a large idol of the god Huitzilopochtli, who whispered directions, gave the Mexica their name...
Criticizing what he said were Chinese plans to build cars in Mexico and sell them to Americans, he stated: "They're not going to be able to sell those cars if I get elected. "Now if I don't get elected it's going to be a bloodbath for the whole, that's going to be the ...
The world's first atomic explosion was conducted on July 16, 1945, during the final weeks of World War II, in the high desert of New Mexico. At Ground Zero, the sand melted in the fireball, and rained back down to the ground, where it re-solidified in the form of a mineral – ...
Study like this is not only for the history of weather, _ 8_ for the history of human beings. You can find only sand now in one place of New Mexico. However, there were millions of people who used to live there. They _9_ suddenly. Why? A group of scientists studied patterns of ...
It is in every cell (细胞) of our bodies. It carries important 1.(information) about our genetic history (史). DNA tests can help us understand ourselves. Twenty 2.(pupil) from Atlanta, the US, took one of these tests.Last fall, they studied 3.(life)science. During their study, ...
Tree rings are important not only for studying the history of weather but also for studying the history of man. Many centuries ago there lived a lot of people at a place in New Mexico. But now you can find only sand there -no trees and no people. What happened? A scientist studied th...
Born in Los Angeles, California, Ochoa’s maternal grandparents had immigrated from Sonora, Mexico. After getting her bachelor of science degree in physics from San Diego State University in 1980, Ochoa went on to the Stanford Department of Electrical Engineering for her masters and doctoral studies...