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1860s
Mt Longonot in Kenya is a dormant stratovolcano. It is believed to have last erupted in the 1860s.
Arsenic did not create the first periodic table. The first periodic table was created by Dmitri Mendeleev, a Russian chemist, in the 1860s. Other scientists had organized elements in other ways prior to the invention of Mendeleev's periodic table, but the other methods were criticized and did not catch on.
Pluto was recently reclassified as a dwarf planet after being considered the 9th planet for over 80 years. This was due to the discovery of several Pluto-sized objects is similar orbits to Pluto, and the suspected existence of hundreds or thousands more.
When the transcontinental railroad was completed in the 1860s, there was no standard time. Towns and cities used their own time and so did regional railroads, and this made for huge problems and hazards in establishing railroad timetables. It was nearly impossible to establish schedules, which not only made it difficult to establish arrivals and departures but also created a situation where trains running on different schedules could have costly and fatal collisions. So in 1883 at the behest of the railroad companies, the United States adopted a system of official time zones based on lines of longitude.
gold
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In the 1860s gold and diamonds were discovered in Southern Africa. People from all over came to cash in on the mineral discoveries.
It was first recognized as a syndrome in the 1860s by Dr. George Beard, who called it neurasthenia.
In the 1860s American Indians were put on reservations because whites wanted the land the the Indians had been given previously. In general reservations were on land no one wanted. Then if it became valuable it was often taken away.
Herpetologist Edward Cope discovered red eyed frog in the 1860s, the red-eyed tree frog is found in the lowlands and on slopes of Central America
The Slocum gun was a pocket revolver made by the Brooklyn Firearms company in the mid-1860s. They are relatively rare, but not as valuable as other guns of the same era.
British physicist James Clerk Maxwell was the first to demonstrate that light consists of electromagnetic waves. His theory of electromagnetics was published in the 1860s.
Yes it was invented in the 1860s
No, the 1860s are in the 19th century.
The cause of the extinction of Archaeopteryx is unknown to archaeologists. Their bones have been discovered since the 1860s and they appear to be easy prey for large dinosaurs.
Yes they ate salad in the 1860s.