A 1 million-year-old fire lit by human ancestors was discovered in 2012 in the Wonderwerk Cave in South Africa. The soil of the cave yielded several dozen stone tools, microscopic plant ashes and burned bone bits. It is supposed that a member of the Homo genus, perhaps Homo erectus , made a fire that produced […]
The success of Bohr’s model of the atom in accounting for the spectrum of hydrogen left this question: Could experiments show directly that atoms do have only certain, separate energy states? In other words, are there really gaps between the energies that an atom can have? A famous experiment in 1914, by the German physicists […]
For a great part of the past century bilingualism was believed to affect intelligence negatively . Jespersen, in 1922, claimed that “the brain effort required to master the two languages instead of one certainly diminishes the child’s power of learning other things.” Still, some people (wrongly) believe that children might get confused by exposure to […]
Humanities & Social Sciences • Science • Technology • Weekly Selection
Newly found form of CRISPR can break apart RNA Researchers have found that a mouth bacterium can make a form of CRISPR that breaks apart RNA rather than DNA. The finding could have applications for adjusting proteins in cells or targeting cancer cells. The New York Times Photons’ quantum properties could be used to send […]
In an open letter to the faculty of Harvard University sent in April 2012, the Library’s Faculty Advisory Council warned that the library of the most world famous university, the richest university, and for many the best university, faced a severe crisis. It was a subscription crisis caused, according to this library council, «by efforts […]
It is said of philosophers that they are ever less willing to recognise a mistake than the ordinary intellect… sorry, man on the street. Actually, an old joke tells about a university rector saying to other that his favourite department is that of mathematics, for mathematicians only ask for paper, pencils and paper bins; “oh […]
Humanities & Social Sciences • Science • Technology • Weekly Selection
Unusual underwater structures are geological, not ancient city Uniquely shaped structures found underwater near the Greek island of Zakynthos are naturally occurring geological forms and not the ruins of an ancient city lost to the sea. The circular structures reminiscent of columns, floors and courtyards likely formed about 5 million years ago during the Pliocene […]
The nose is one of the strangest structures of human anatomy. It is much more different from our closest relatives than other parts of the body, it is sexually dimorphic, being on average larger in males than in females, and it is different among different hominin species and among different ethnic groups. Size and shape […]
The idea that the solution of Schrödinger’s equation is a wave that represents, not a physical wave, but the probability of finding the associated particle in some specific condition of motion has had great success. In fact, every experiment devised so far to test this interpretation has confirmed these results. Yet many scientists still find […]
If you feel stuck for words every once in a while, the most straightforward answer is that there is nothing wrong with you. Fifty years ago, Roger Brown and David McNeill at Harvard University showed that it is possible to trigger “a state in which one cannot quite recall a familiar word but can recall […]