792,344 articles

How a plant regulates its growth

Plants grow towards the light. This phenomenon, which already fascinated Charles Darwin, has been observed by everyone who owns houseplants. Thus, the plant ensures that it can make the best use of light to photosynthesize and synthesize sugars. Similarly, the roots grow into the soil to ensure that the plant is supplied with water and nutrients.

Researchers probe the 'full' thermoelectric properties of a single molecule

One of the dreams of physicists today is being able to harvest electricity back from dissipated heat. The key to this probably resides in circuits that contain single molecules. Instead of being limited to classical conductance, the thermopower can be enhanced dramatically by the properties of quantum states. But then, what quantum states offer good efficiency? What characteristics are desirable?...

Second order optical merons, or light pretending to be a ferromagnet

One of the key concepts in physics, and science overall, is the notion of a 'field' which can describe the spatial distribution of a physical quantity. For instance, a weather map shows the distributions of temperature and pressure (these are known as scalar fields), as well as the wind speed and direction (known as a vector field). Almost everyone wears a vector field on their head—every hair...

Study examines what makes people susceptible to fake health news

A new study from University of Kansas journalism & mass communication researchers examines what influences people to be susceptible to false information about health and argues big tech companies have a responsibility to help prevent the spread of misleading and dangerous information.

New algorithm identifies 'escaping' cells in single-cell CRISPR screens

A team of researchers from New York University and the New York Genome Center has developed a new computational tool to help understand the function and regulation of human genes. The results, published today in the journal Nature Genetics, demonstrate how to interpret experiments that combine the use of CRISPR to perturb genes along with multimodal single-cell sequencing technologies.

Understanding the spatial and temporal dimensions of landscape dynamics

The Earth's surface is subject to continual changes that dynamically shape natural landscapes. Global phenomena like climate change play a role, as do short-term, local events of natural or human origin. The 3-D Geospatial Data Processing (3DGeo) research group of Heidelberg University has developed a new analysis method to help improve our understanding of processes shaping the Earth's surface...

Behavior of wild capuchin monkeys can be identified by marks left on their tools

A group of researchers including Tiago Falótico, a Brazilian primatologist at the University of São Paulo's School of Arts, Sciences and Humanities (EACH-USP), archeologists at Spain's Catalan Institute of Human Paleoecology and Social Evolution (IPHES) and University College London in the UK, and an anthropologist at the Max Planck Institute for Evolutionary Anthropology in Germany, have...

In era of online learning, new testing method aims to reduce cheating

The era of widespread remote learning brought about by the COVID-19 pandemic requires online testing methods that effectively prevent cheating, especially in the form of collusion among students. With concerns about cheating on the rise across the country, a solution that also maintains student privacy is particularly valuable.

The selection of leaders of political parties through primary elections penalizes women

A study by two researchers at the UPF Department of Political and Social Sciences (DCPIS) has examined the effect of selecting party leaders by direct vote by the entire membership (a process known in southern Europe as 'primaries' and in English-speaking countries as 'one member, one-vote,' OMOV) on the likelihood of a woman winning a leadership competition against male rivals.

The human brain grew as a result of the extinction of large animals

A new paper by Dr. Miki Ben-Dor and Prof. Ran Barkai from the Jacob M. Alkow Department of Archaeology at Tel Aviv University proposes an original unifying explanation for the physiological, behavioral and cultural evolution of the human species, from its first appearance about two million years ago, to the agricultural revolution (around 10,000 BCE). According to the paper, humans developed as...

New skills of graphene: Tunable lattice vibrations

Without electronics and photonics, there would be no computers, smartphones, sensors, or information and communication technologies. In the coming years, the new field of phononics may further expand these options. That field is concerned with understanding and controlling lattice vibrations (phonons) in solids. In order to realize phononic devices, however, lattice vibrations have to be...

How 'great' was the great oxygenation event?

Around 2.5 billion years ago, our planet experienced what was possibly the greatest change in its history: According to the geological record, molecular oxygen suddenly went from nonexistent to becoming freely available everywhere. Evidence for the Great Oxygenation Event (GOE) is clearly visible, for example, in banded iron formations containing oxidized iron. The GOE, of course, is what allowed...

Searching for novel targets for new antibiotics

Ribosome formation is viewed as a promising potential target for new antibacterial agents. Researchers from Charité - Universitätsmedizin Berlin have gained new insights into this multifaceted process. The formation of ribosomal components involves multiple helper proteins which, much like instruments in an orchestra, interact in a coordinated way. One of these helper proteins—protein...

Tundra vegetation shows similar patterns along microclimates from Arctic to sub-Antarctic

Researchers are in the search for generalisable rules and patterns in nature. Biogeographer Julia Kemppinen together with her colleagues tested if plant functional traits show similar patterns along microclimatic gradients across far-apart regions from the high-Arctic Svalbard to the sub-Antarctic Marion Island. Kemppinen and her colleagues found surprisingly identical patterns.