25.4 C
Santiago, CL
Saturday, February 24, 2018

New perovskite solar cell design could outperform existing commercial technologies

A new design for solar cells that uses inexpensive, commonly available materials could rival and even outperform conventional cells made of silicon. In a new article, researchers describe using tin and other abundant elements to create novel forms of perovskite -- a photovoltaic crystalline material that's thinner, more flexible and easier to manufacture than silicon crystals.

Early fossil fish from China shows where our jaws came from

Where did our jaws come from? The question is more complicated than it seems, because not all jaws are the same. In a new article, palaeontologists from China and Sweden trace our jaws back to the extinct placoderms, armoured prehistoric fish that lived over 400 million years ago.

African clawed frog genome contains 2 full sets of chromosomes from 2 extinct ancestors

Millions of years ago, one species of frog diverged into two species. Millions of years later, the two frogs became one again, but with a few extra chromosomes due to whole genome duplication. Such is the curious case of the African clawed frog, a frog whose genome contains nearly double the number of chromosomes as the related Western clawed frog.

Monkeys are seen making stone flakes so humans are ‘not unique’ after all

Researchers have observed wild-bearded capuchin monkeys in Brazil deliberately break stones, unintentionally creating flakes that share many of the characteristics of those produced by early Stone Age hominins. The difference is that the capuchins' flakes are not intentional tools for cutting and scraping, but seem to be the by-product of hammering or 'percussive behavior' that the monkeys engage in to extract minerals or lichen from the stones.

Shadows reveal how insects walk on water

Water striders' ability to walk and jump on the surfaces of ponds and lakes has long amazed curious observers -- and inspired robot designers who want to mimic the bugs' talent. Now, scientists have measured for the first time key parameters that allow them to walk on water -- by studying their leg shadows.

Impact of the Fukushima accident on marine life, five years later

Five years ago, the largest single release of human-made radioactive discharge to the marine environment resulted from an accident at the Fukushima Daiichi Nuclear Power Plant in Japan. Approximately 80 percent of the fallout happened over the Pacific Ocean. A new study explores the environmental consequences in the marine environment of the accident. It outlines the status of current research about the impact of the fallout on plant and animal life and what remains to be done as the radioactivity continues to spread.

Mystery species hidden in cave art appears to be unknown bison-cattle hybrid

Ancient DNA research has revealed that Ice Age cave artists recorded a previously unknown hybrid species of bison and cattle in great detail on cave walls more than 15,000 years ago.

Age of first chief’s ancient tomb reveals Pacific Islanders invented new kind of society

New uranium series analysis of chief's tomb suggests island's monumental structures are earliest evidence of a chiefdom in the Pacific -- yielding new keys to how societies emerge and evolve.

New satellite image database maps the dynamics of human presence on Earth

Built-up areas on the Earth have increased by 2.5 times since 1975. And yet, today 7.3 billion people live and work in only 7.6% of the global land mass. Nine out of the ten most populated urban centres are in Asia, while five out of the ten largest urban centres are in the United States. These are some of the numbers calculated by a new global database which tracks human presence on Earth.

Disguised as a tuna, bioswimmer is changing the game for underwater inspections

BioSwimmer is a semi-autonomous underwater vehicle equipped to inspect a vessel’s exterior for illicit cargo and contraband, as well as harbor facilities for unwanted activity.

Stay connected

- Advertisement -

Latest article

Syria war: UN Security Council approves 30-day ceasefire

Some of the biggest jihadist rebel groups, and their associates, are not covered by the truce. Source: BBC

Vicar of Dibley actress Emma Chambers dies aged 53

Dawn French and Hugh Grant among co-stars to pay tribute to the "loving" Vicar of Dibley actress. Source: BBC

La Casa Blanca acuerda divulgar el memo demócrata

La Comisión de Inteligencia de la Cámara de Representantes dio a conocer el sábado un memorando demócrata en forma redactada que busca refutar las acusaciones republicanas sobre abusos en la vigilancia realizada por el FBI Fuente: Cnnenespanol.com