Sentences with phrase «early 20th»

More recent remains include bones from a medieval graveyard, and others from Swiss citizens who died in the early 20th century.

By the early 20th century clinicians turned their attention to the role of the blood vessels, inspired in part by observations of strong pulsing of the temporal arteries in migraine patients, as well as patients» descriptions of throbbing pain and the relief they got from compression of the carotid arteries.

Modern postural yoga, the practice of actually holding poses, originated with early 20th century guru Krishnamacharya, who taught a mix of gymnastic and wrestling moves, Western calisthenics and hatha yoga, a medieval practice all but lost in India for centuries.

The tree - ring record the researchers cobbled together confirms earlier research that suggests the mid-18th and early 20th centuries were the driest periods in the southern Appalachian Mountains since at least 1700, while extending the record further back in time to document a «substantial» drought from 1669 to 1709.

Dr. Charlier argues that human remains in museums and scientific institutions can be divided into four categories, «ethnographical elements» such as hair samples with no certain identification; anatomical remains such as whole skeletons or skulls; archaeological remains; and more modern collections of skulls, used in now discredited studies in the early 20th century.

Kotsonas serves as a consultant on the project, which is dedicated to intensively surveying the Knossos valley and documenting the development of the site from 7000 BC, to the early 20th century.

Staver and former Yale postdoc Julie C. Aleman, now at the University of Montreal, used traditional sources such as early 20th - century European maps to estimate the extent of African forests in 1900.

Knowing that researchers in the early 20th century had shown that avian predators can wipe out an entire population of cicadas that emerges out of sequence, Koenig decided to take a look at how bird populations might affect the insects» cycles.

However, the idea fell out of favour in the early 20th century when Gerhard Heilmann, a Danish artist and scientist, published a hugely influential book, The Origin of Birds, arguing that birds evolved directly from a primitive archosaur, a reptilian group which also gave rise to dinosaurs, pterosaurs and crocodiles.

However, the fortunes of physics picked up again in the early 20th century with the appointment of George Thomson, son of J. J. Thomson, who discovered the electron.

On top of that, explorations occurred during a time of global cooling known as the Little Ice Age, which stretched from the 13th to early 20th centuries.

For rail workers and passengers of the 19th and early 20th centuries, train travel — while miraculous for the speed with which it carried people across vast distances — presented ghastly dangers.

The most noticeable changes occurred in the last 50 years and in the early 20th century until the 1930s.

That glimpse into the past was provided by 66 tree - ring data sets scientists used to stitch together an annual record of snowpack far older than modern observations, which began in the early 20th century.

In the early 20th century, Harvard University astronomer Henrietta Leavitt discovered that the brighter the star, the slower its brightness varies.

Thus Sheldrake quotes the early 20th - century naturalist W. J. Long who reported that vixens were able to control their gambolling cubs at a distance without making any sound but simply by staring at them.

Nicknames aside, much of the world calls the psychotropic plant by its scientific name, cannabis, and — until the early 20th century — so did Americans.

Scientists have known since the early 20th century that chimps are capable strategists — they'll stack boxes to reach a dangling bunch of bananas, for instance.

I seem to recall an expedition in the early 20th century that went there soon after and found the point from which all the trees appeared to have been blown over.

First Expedition Part of the enduring mystery of the Tunguska event harks back to the stark physical isolation of central Siberia and the political turmoil that raged in Russia during the early 20th century, a time when the czarist empire fell and the Soviet Union emerged.

Until the last few decades, the frontal lobes of the brain were shrouded in mystery and erroneously thought of as nonessential for normal function — hence the frequent use of lobotomies in the early 20th century to treat psychiatric disorders.

The forests in the Coweeta Basin reflect the disturbance history of the region, which in addition to climate change has experienced early 20th century logging, drought, hurricanes, and insect and disease outbreaks, these last including the extirpation of the American chestnut, once the most important species in southern Appalachian forests.

Henry Ford's original Model T of the early 20th century, for example, was designed to run on hemp - based ethanol.

The analog recordings, taken for 72 years since the early 20th century, provide a window onto space weather in the mid-1900s and shed light onto future patterns of plasma movement in near - earth space.

Confusion over the identification of this reptile stretches back to the 19th and early 20th centuries.

Early 20th - century studies claimed that hermit thrush song follows the same principles found in human musical systems, but these were anecdotal reports which were not supported by a rigorous analysis.

A lice - borne typhus epidemic swept westward from Russia in the early 20th century, and by World War II, German troops in trenches on the Eastern Front were falling fast to the disease.

A substantial population of feral dromedaries, descended from pack animals that escaped in the 19th and early 20th centuries, thrives in the Australian interior today.

She notes that in Africa, the longstanding Western legend of an «African unicorn» was explained in the early 20th century by British researchers, who found and described the flesh - and - blood okapi, a giraffe relative that looks like a mix between that animal and a zebra and a horse.

Since radio towers began climbing over towns and cities in the early 20th century, the air has grown thick with wireless communication, the platform on which radio, television, cellphones, satellite broadcasts, Wi - Fi, GPS, remote controls and hundreds of other technologies rely.

The use of «contracted help» was established for lower skilled workers in the early 20th century.

New ice cores taken from the summit of Mt. Hunter in Denali National Park show summers there are least 1.2 - 2 degrees Celsius (2.2 - 3.6 degrees Fahrenheit) warmer than summers were during the 18th, 19th, and early 20th centuries.

The steam engine gave rise to the whistle - stop campaign tours of the early 20th century; television made the first 1960 Kennedy - Nixon debate into a national event.

And there is a lot of money being spent as cities whose storm sewers date to the early 20th century have struggled to clean up discharges into waterways from underground networks of pipes that have often never been mapped.

The heads were excavated (and removed from their bodies) in the early 20th century and now reside in two collections in Germany, at the University of Tübingen and Berlin's Museum of Prehistory and Early History.

Among the fossils studied was this claw of an unidentified theropod, found in Canada in the early 20th century.

As the mining boom waned in the early 20th century, local communities turned to other subsistence activities, including flower collecting.

The birds have been the subject of a long - term study that started back in 1959, and of other studies that stretch back into the early 20th century.

In the early 20th century, 11,000 - year - old cave paintings of woolly mammoths were found in France, suggesting, along with other discoveries of that time, that the creatures once lived side by side with humans.

There was even an attempt in the early 20th century to induce fevers in cancer patients to trigger remissions, which generally didn't work.

William Phelps Eno, a pioneer of vehicular traffic control in the early 20th century, wrote about gridlock caused by horse - drawn carriages on the streets of his native New York City in the 1860s.

While previously there was a general understanding that ecotheology surfaced only in the late 1960s, Pihkala found many examples of earlier ecological engagement in the texts contributing to achieving a sustainable human - earth relationship from the early 20th century archives both in Europe and beyond.

Writing at the height of a radium craze that swept across Europe and America in the early 20th century, Saleeby was one of many observers who connected radium and radioactivity to the mysteries of life.

More than 80 % of the ice on Africa's highest peak has melted since the early 20th century, joining other glaciers that are ebbing from the world's tropical mountains at an accelerating rate.

The next challenge is to confirm the early 20th - century experiments showing that plant cells themselves can act like lenses — and researchers still need to figure out all the ends to which plants put their rudimentary sight.

Radium played an important, but often forgotten, role in life sciences research in the early 20th century

During one of the most dramatic waves of racist and eugenic ideas in the early 20th century, the great paleontologist George Gaylord Simpson astutely observed that «Whether or not they are really pertinent, biological theories are being used in this field, and the biologist necessarily has a part in the discussion.»

Farmers withstood the High Plains» frequent droughts and dry spells by pumping groundwater from the region's aquifers, a trend that accelerated sharply with the electrification of rural America in the early 20th century.

After the insects invaded North America in the early 20th century, farmers discovered that pheromone - laced traps could tempt males away from females and from maize crops that the moths infest.

Yet, in the 1990s, anthropologist Frank Salomon discovered that villagers in San Andrés de Tupicocha, a small rural community in the same province as Collata, had continued to make and interpret khipus into the early 20th century.