<span>Supposedly at Jamestown but there are lots of theories about Norsemen (Vikings) travelling there in the 9th and 10th centuries and establishing settlements in Nova Scotia
</span>
Answer:
Photosynthetic organisms was the reason of these atmospheric changes.
Explanation:
The plant which is discovered by the scientists that is apparently devoid of life but has ice caps located at the poles which reveals that planet's atmospheric O₂ levels sharply increased about 1,000,000 years ago was due to evolution of photosynthetic organisms like cyanobacteria etc which went extinct and then O₂ levels dropped quickly 50,000 years ago. So photosynthetic organisms was the reason of these atmospheric changes.
A material prepared in ancient Egypt from the pithy stem of a water plant, used in sheets throughout the ancient Mediterranean world for writing or painting on and also for making rope, sandals, and boats.
On March 4, 1980, nearly three decades later, Congress completed the final action on ‘’The Refugee Act of 1980. It was the first major reform of the refugee provisions of the U.S immigration law. This act was created to provide a permanent and systematic procedure for admission into the U.S and to provide effective resettlement and absorption of these refugees.
The major objectives of the refugee act were to form a new definition of refugee that was more or less like the one created at the Protocol on the Status of the Refugees. It was to raise the cut from 17,400 to 50,000 refugees admitted each fiscal year.
It was also required to provide emergency support procedures for when that number exceeded the 50,000 mark. The Act created an Office of refugee Resettlement. This office was responsible for administering and funding federal programs for domestic refugees.
The Sun's rays hit the Earth's surface nearly at right angles at the Earth's equator.
During equinox periods in March and September, the Sun's rays hit the Equator at a perpendicular angle because the Sun is in a position in the sky directly over the Earth's equator. This in turn means that the Sun's rays hit the Earth’s surface nearly at right angles
