How do scientists know that something has happened in past almost 1000 years ago?

Question

How Do they research

Answer 1

They guess.

Answer 2

Sometimes they study the bodies of the deceased or fossils in the ground of animals and plants. They do extensive research and lab work on this to draw their conclusion. You can tell so much about a person even if they have died just by studying the bone structure or the teeth. Look at the Egyptian mummys that scientist study. They can even tell how they died or what their heirchy was based on what they were buried with. There are lots of amazing things they can do these days.

Answer 3

Sometimes they study the bodies of the deceased or fossils in the ground of animals and plants. They do extensive research and lab work on this to draw their conclusion. You can tell so much about a person even if they have died just by studying the bone structure or the teeth. Look at the Egyptian mummys that scientist study. They can even tell how they died or what their heirchy was based on what they were buried with. There are lots of amazing things they can do these days.

Answer 4

Evidence is everywhere. What scientists do is observe and examine things according to the scientific method.

One of the posts mentions radiocarbon dating. This is based on the decay rate of different carbon isotopes. Life forms on Earth are carbon-based. When they are living they have a fairly constant amount of radioactive carbon, and when they die the radioactive carbon begins to decay. By measuring how much is left, they can figure out how long ago that animal or plant died.

Answer 5

Science is a body of empirical and theoretical knowledge, produced by a global community of researchers, making use of specific techniques for the observation and explanation of real phenomena, this techne as a whole being summed up under the heading of scientific method. As such, the history of science draws on the historical methods of both intellectual history and social history.

The Scientific Revolution of the sixteenth and early seventeenth century saw the inception of modern scientific methods to guide the evaluation of knowledge. This change is considered to be so fundamental that some — especially philosophers of science and practicing scientists — consider such earlier inquiries into nature to be pre-scientific. Traditionally, historians of science have defined science sufficiently broadly to include those inquiries.[1]

The history of mathematics, history of technology, and history of philosophy are covered in other articles. Mathematics is closely related to, but distinct from science (at least in the modern conception). Technology concerns the creative process of designing useful objects and systems, which differs from the search for empirical truth. Philosophy differs from science in that, while both the natural and the social sciences attempt to base their theories on established fact, philosophy also enquires about other areas of knowledge, notably ethics. In practice, each of

Answer 6

As the previous answer said, artifacts are one thing that is studied. Sediments can also give clues to past events.

While digging the foundation for our home, we came across several broken arrowheads, and along a trench we noticed a layer of sediment (about 2 feet wide and several inches deep) that contained charcoal, while the rest of the sediment was clay and plant material.
This physical evidence, plus background knowledge led us to believe that the land was once a campsite for paleolithic natives.

Answer 7

They read books. In the year A.D. 1054, almost 1000 years ago, a supernova exploded. People in many parts of the world saw it, measured its characteristics, and recorded it. Today you can see it by the Hubble telescope. It's the Crab nebula.

Answer 8

It depends on what you are talking about. We can date objects using carbon dating if that is what you mean. There is a predictable rate of radioactive decay in certain elements. You can tell how old something is by hwo much it has decayed.

Answer 9

the scientist came to know just by the fossils.the fossils are the nice source for this. there are many fossils. they came to know about the occurence of huge dinoscers in this manner only. they use radioactive technology to study about this.

Answer 10

Dating Methods, in Earth sciences, methods used to date the age of rocks and minerals. By applying this information, geologists are able to decipher the 4.6-billion-year history—or chronology—of the Earth. The events of the geological past—uplift of mountain ranges, opening and closing of seas, flooding of continental interiors, changes in climate—are all recorded in the strata of the Earth’s crust.

A. Dendrochronology

This method of dating events and conditions of the recent past is based on the number, width, and density of annual growth rings of long-lived trees. In the south-western United States, for example, a master tree-ring index has been constructed from the Douglas fir and bristlecone pine. This index enables dendrochronologists to date accurately events and climatic conditions of the past 3,000 to 4,000 years.

B. Varve Analysis

One of the oldest methods employed for absolute age determination, varve analysis, was developed by Swedish scientists in the early 20th century. A varve is a sedimentary bed, or sequence of beds, deposited in a body of still water over the period of a year. Counting and correlation of varves have been used to measure the ages of Pleistocene glacial deposits. By dividing the rate of sedimentation in terms of units per year by the number of units deposited following a geological event, geologists can establish the age of the event in years.

C. Obsidian Hydration Dating

Also referred to as hydration rind dating or obsidian dating, this method is used to calculate ages in years by determining the thickness of rims (hydration rinds) produced by water vapour slowly diffusing into freshly chipped surfaces on artefacts made of obsidian, or recent volcanic, glass. The method is applicable to types of glass which are 200 to 200,000 years old.

D. Thermoluminescence (TL) Dating

This method is based on the phenomenon of natural ionizing radiation inducing free electrons in a mineral that can be trapped in defects of the mineral’s crystal lattice structure. These trapped electrons escape as thermoluminescence (TL) when heated to a temperature below incandescence, so that by recording the TL of a mineral such as quartz and assuming a constant natural radiation level, the last drainage of the trapped electrons can be dated back to several hundred thousand years. In TL dating of pottery, for example, the specimen is heated until it glows with energy that has been stored ever since it was fired.

Answer 11

to put it simply they drill holes in ice and take core samples that will tell you all about the atmosphere at that time and space.