Solar and wind energy may stabilise the power grid

Renewable energies such as wind, sun and biogas are set to become increasingly important in generating electricity. If increasing numbers of wind turbines and photovoltaic systems feed electrical energy into the grid, it becomes denser – and more distributed. 

COLŢUL DE CULTURĂ: Massimo Donà – Filosofia vinului. De la Socrate la Sartre. O lectură plăcută de toamnă

Ampla lucrare a lui Massimo Donà reprezintă o incursiune doctă în istoria ideilor filosofice dezvoltate în jurul ”nectarului di-vin”. De la Socrate la Nietzsche şi de la Marx la Sartre, vinul a fost omniprezent în viaţa şi în gândirea oamenilor din toate timpurile. 

Strugurii s-au copt şi se aporpie vremea vinului. Ce lectură ar putea fi mai potrivită decât o istorie a filosofiei nectarului dionisiac?

Massimo Donà acceptă în cartea sa, încărcată cu anecdote şi istorii savuroase, provocarea unui paradox al vinului, cel prin care doar necumpătarea beţiei poate dezvălui măsura raţiunii, făcând vizibilă legătura dintre băutura deopotriva blamată şi ridicată în slăvi şi ideile minţilor strălucite, din Antichitate şi până în modernitate.

Stele speciale, cu caracteristici uimitoare

Când le privim, par toate aproape la fel. Dacă am putea călători până la ele, am vedea cât de diferite pot fi. Observatoarele astronomice au reuşit să ne apropie întrucâtva de stele şi au dezvăluit în unele cazuri proprietăţi de-a dreptul uimitoare.

În articolul de faţă sunt grupate stele şi sisteme stelare ce ies din tipare, arătându-ne cât de divers şi inventiv este Universul în care trăim.

În paranteză sunt informaţii despre constelaţia din care face parte steaua, distanţa în ani-lumină de Soare, vârsta – când este cazul.

Southern Africa: Mapungubwe - South Africa's Lost City of Gold

One thousand years ago, Mapungubwe in Limpopo province was the centre of the largest kingdom in the subcontinent, where a highly sophisticated people traded gold and ivory with China, India and Egypt.

The Iron Age site, discovered in 1932 but hidden from public attention until only recently, was declared a World Heritage site by the United Nations Educational, Scientific and Cultural Organisation (Unesco) in July 2003.

Misterul materiei întunecate, elucidat?

Universul este compus dintr-o cantitate vastă de materie invizibilă denumită, generic, materie întunecată. Această materie umple spaţiul dintre galaxii şi spaţiul dintre stelele unei galaxii. Nu se ştie încă ce anume reprezintă această materie întunecată.

De la predicţia materiei întunecate în urmă cu mai mult de 70 de ani, tot felul de cercetători – astronomi, cosmologi şi fizicieni ai particulelor, au căutat răspunsuri la întrebarea: ce anume ar putea fi materia întunecată? Odată cu ultimele observaţii ale satelitului Planck, cercetători ai Institutului Niels Bohr, printre alţii, ar putea fi mai aproape ca niciodată de găsirea unei soluţii privind originea misterioasei materii întunecate.

Who Were the Etruscans?

Answer:

The Etruscans, who lived in Etruria, were known as Tyrrhenians by the Greeks. They were at their height in Italy from the 8th to the 5th century B.C. Herodotus (c. 450 B.C.) reports, as a theory of their origin, that the Etruscans came from Asia Minor. Recent work on DNA in cattle suggests Herodotus may have been right, although some still consider them indigenous to the Italic peninsula.

Will Ancient Akrotiri Face Another Massive Eruption?

Akrotiri is well known to archaeologists as the excavation site of a remarkably well-preserved Minoan Bronze Age settlement that was buried by the massive and widespread Theran eruption in the middle of the second millennium BC. The eruption was one of the largest volcanic events in recorded history. 

It devastated the island of Thera (also called Santorini), which included the settlement at Akrotiri, in addition to communities and agricultural areas on nearby islands and on the coast of Crete. Like the Roman ruins of Pompeii much later in 79 A.D., it's buildings and human artifacts were exceptionally preserved under the super-heated, yet protective, covering of the volcano's ashfall.  Frescoes, pottery, furniture, advanced drainage systems and three-story buildings have been discovered at the site through excavations conducted by Spyridon Marinatos beginning in 1967. Some historians suggest that this settlement, as well as the volcanic disaster, was the inspiration for Plato's writing about Atlantis.

Supercomputer Recreates Universe From Big Bang to Today

Scientists would love to be able to rewind the universe and watch what happened from the start. Since that's not possible, researchers must create their own mini-universes inside computers and unleash the laws of physics on them, to study their evolution.

Now researchers are planning the most detailed, largest-scale simulation of this kind to date. One of the main mysteries they hope to solve with it is the origin of the dark energy that's causing the universe to accelerate in its expansion.

Dark Energy Really IS Real

Our universe is a mysterious place. Only 4 percent or so is made up of the ordinary matter we see around us, including all those galaxies filled with stars. The rest, physicists believe, is made of up weakly interacting dark matter, and a mysterious substance called dark energy that is causing the cosmos to expand at an accelerating rate.

At least, that's the working hypothesis, and it seems to fit the data, although there are scientists who question its existence and tout alternatives to explain that accelerating expansion.

Ancient Tomb Built to Flood—Sheds Light on Peru Water Cult?

Archaeologists in Peru thought they had discovered something special when they uncovered the tomb of a pre-Inca priestess and eight other corpses in 2011. But an even bigger find was right beneath their feet.

Continuing their search for artifacts a year later, the team dug beneath the priestess, uncovering a basement tomb they believe was built by an ancient water cult and meant to flood.