Tag Archives: Human

Instead of finding alien life, should we be hiding from it?

A recent study suggests a method for hiding from aliens. This study, published in the Monthly Notices of the Royal Astronomical Society, comes at a time when most papers and study are related to how to find alien life.

A great deal of our quest for Earth-like planets depends on transiting planets. Transiting planets travel in front of their host star in a manner in which the transit can be seen from our viewpoint. The travel of the planet in front of the host star makes the light from that star diminish or glimmer, and we can utilize that to determine a wide range of information about far off planets — including how sustainable they might be for life.

Should we hide from the aliens? Graphic from Andreas Rocha
Should we hide from the aliens? Graphic from Andreas Rocha

A few scientists have proposed that we ought to hope that Earth is a transiting planet from the viewpoint of another planet that contains intelligent life. At the end of the day, our best endeavor for discovering alien life may be trusting that aliens are utilizing similar techniques of planetary detection that we are, and that the movement of Earth in front of the sun is visible with their telescopes.

Graduate student Alex Teachey and Professor David Kipping, both from Columbia University in the City of New York, attempted to figure out how much laser light would be required to cover the diminishing or glimmering light brought about by the transit of Earth.

As indicated by their calculations, it would take about 10 constant hours of shining a 30 MW laser once every year to shield the transit signal in discernible light. Reproducing each wavelength of light released by the sun would require around 250 MW of power.

Teachey said in a statement that “Alternatively, we could cloak only the atmospheric signatures associated with biological activity, such as oxygen, which is achievable with a peak laser power of just 160 kW per transit. To another civilization, this should make the Earth appear as if life never took hold on our world.”

There’s still a major, interdisciplinary deliberation about whether we should try to contact alien life from other planets. This study will become one of many that detail whether or not we should be hiding from alien life, instead of if we should find it and try to communicate with them.

Hobbits were real?

An ancient, 3-foot-tall human, whose unusually small stature has earned it the moniker “hobbit”, has astounded evolutionary researchers since it’s bones were discovered on the island of Flores, in Indonesia. Some scientists have proposed that the individual was a Homo sapien with a growth disorder.

Endocasts of the skulls of a hobbit (left) and a modern human (right). Credit: Professor Peter Brown, University of New England
Endocasts of the skulls of a hobbit (left) and a modern human (right).
Credit: Professor Peter Brown, University of New England

Recently discovered teeth from the hobbit propose it is a unique species, as opposed to a present-day human with a development issue. The new research also proposes that hobbits may share a immediate ancestor with present-day humans.

The 18,000-year-old fossil remains of the hobbit were found in 2003. From that point forward, scientists have suggested that the hobbit, which had a brain about the size of a grapefruit, was a branch of the human lineage Homo, named Homo floresiensis. On the other hand, separate scientists have contended that the hobbit was truly a current human with microcephaly, a condition that leads to an abnormally little head, a little body and some mental impediment.

To learn more about the hobbit, researchers have now performed the first comprehensive investigation of the ancient human’s teeth. The analysts contrasted the 40 known hobbit teeth and those from 490 present-day people from Asia, Oceania, Africa and Europe, as well as from an assortment of extinct hominins, such as Homo habilis.

The scientists discovered that hobbit teeth were as small as those from short present-day humans. On the other hand, different features of these teeth looked totally divergent from those of present-day humans.

The hobbit teeth showed a mix of more primitive traits seen in early hominids and more advanced traits found in later hominins. Credit: livescience.com
The hobbit teeth showed a mix of primitive traits and advanced traits. Credit: livescience.com

The hobbit teeth showed an exceptional mosaic of primitive attributes seen in early hominins blended with more-propelled characteristics displayed by later hominins, the scientists said. For example, the canine and premolar teeth looked primitive, while the molar teeth looked advanced, or as though they had emerged later in the evolution of Homo sapiens.

These discoveries negate prior assertions that hobbits had teeth completely like those of modern humans. The outcomes likewise propose that hobbits were not simply modern humans with serious abnormalities, the scientists said.

While human ancestry, for the most part, developed bigger bodies and brains through time, the hobbit suggests that seclusion on islands could considerably switch this developmental pattern, Yousuke Kaifu, a paleoanthropologist at Japan’s National Museum of Nature and Science, Tokyo, said.

The scientists detailed their discoveries November 18 in the online journal PLOS ONE.

A new skull and a new beginning

Humans often ponder why we exist, where we came from and how we got here. We ask questions that are rather deep and intellectual because we’re curious by nature. Philosophy aside, the theory of evolution is deeply rooted in our education.

For the past two million years, the human race has evolved and adapted. Scientists are continuously studying human evolution. These seekers of the past study how our ancestors discovered fire and how we went from nomads to

The skull being unearthed at the dig site. Image from USA Today.
The skull being unearthed at the dig site. Image from USA Today.

farmers. Recently, these scientists found something that might make us rethink human evolution. Scientists in the Republic of Georgia have discovered a skull that may be a missing link in our evolutionary chain. Continue reading A new skull and a new beginning