No one knows just how or when they got to what is now the United States. Some scientists think that they crossed from Asia on the land bridge that once connected Siberia and Alaska. This probably happened about 30,000 or 40,000 years ago. The Indians lived on the land by hunting, “...
A tsunami is a long, high sea wave or series of waves generated as a result of earthquakes, volcanic activity, a submarine landslide, or other disturbance. As the wave(s) generated approach land, the rising seafloor causes the waves to increase in height, sometimes to towering waves capable...
The outbreak comes amid an already challenging respiratory virus season in New York State, where flu cases have reached a 15-year high. The other affected states are Alaska, Georgia, Rhode Island, and Texas. Outbreaks are primarily affecting unvaccinated individuals. Massachusetts maintains high ...
when they got to what is now the United States. Some scientists think that they crossed from Asia on the land bridge that once connected Siberia and Alaska. This probably happened about 30,000 or 40,000 years ago. The Indians lived on the land by hunting, “第一个美国人”是印地安人。