When the LIGO detector first measured gravitational waves four years ago, it was a sensation. The signal came from two black holes that had swallowed each other. Now it appears that this has happened nine times since then. In one case, a new record has even been set for the mass of two fusing black holes.
The video above shows how the interplay between the orbit of the earth and that of the moon causes a total solar eclipse somewhere on earth once every one or two years. In addition, the question is answered how it is that the shadow of the moon makes the sun black. In the video you will find the answers to these questions How does a total solar eclipse arise?
A giant solar cell installation in Australia can store more energy from the sun than any other installation in the world. The Riverland region in the state of South Australia will be equipped with 3.4 million solar panels. ### Solar cells charge 1.1 million batteries Once installed, the installation will have a capacity of 330 megawatts, and no less than 1.1 million batteries will store the staggering amount of energy that the installation generates.
Kæber er et meget individuals træk for en art, now viser and undersøgelse, at menneskets kæbeanatomi can spore tilbage til panserhajerne, som herskede i havene i and fjern fortid. The afslører ny forskning, som palæontologer fra universitetet i den svenske by Uppsala har bedrevet i samarbejde med kolleger fra Kina.
An artificial coma is an extreme form of complete anesthesia in which doctors put the brain out of action; the patient does not regain consciousness and cannot respond to influences. In an artificial coma, heart rhythm, blood pressure and breathing must be maintained mechanically or with medication.
22 million tons of CO2 per year. That is the emission of computer systems that win bitcoins, according to a study by the technical university of Munich. That is about half the amount of CO2 that countries such as Norway and Ireland emit annually, and more CO2 than for example Estonia, Croatia or Kenya release into the atmosphere every year.
Mount Roraima in Venezuela is the most famous example of a table mountain: a mountain with a flat top and vertical flanks. In the local language this type of mountain is called 'tepui', the home of the gods, of which Mount Roraima is by no means the only one. These and the other table mountains in the area are erosion residues, which means that they rise above the landscape because the material around them is eroded 400 meters perpendicularly down on all sides. The Roraima is the largest of its kind in South America with a top of 31 km2 and vertical flanks of 400 meters on all sides.
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Have you always wanted to bring your awkward scribbles to life? Now it is possible! A new, online artificial intelligence 'translates' your squabbling into flesh and blood, as good and as bad as it goes. The program was developed by the science program The knowledge of the NTR today. The software tries to convert your scratches into a portrait of News and Co-presenter Lara Rense.
For years, engineers have wanted submarines to communicate with airplanes. Now researchers at MIT in the US have succeeded. A new, sensitive radar registers the smallest ripples on the water surface. This means that aircraft will soon be able to read signals from a submarine sonar.
The doppler effect describes how the pitch of a sound changes as the sound source and the receiver move relative to each other. A well-known example is the siren of an ambulance, which sounds lower when the vehicle has passed us. ### Siren makes sound Brain creates sound Sound is an experience that your brain creates based on pressure differences in the air.
10 million pumps with wind power have to take seawater from the depth and spray it over the Arctic ice. Here, with the harsh winter cold of -35 to -40 ° C, the seawater will quickly freeze and thicken the waning ice cap. Climate scientists warn that global warming may have disappeared from the North Pole in the summer of 2030 due to global warming, and because of this bleak prospect, a team of researchers from Arizona State University in the US have devised the spectacular rescue plan.
Stiffening muscles in rigor mortis Rigor mortis or corpse stiffness occurs three to four hours after death has started, when the energy depots of the muscles are empty. Muscles need energy to work and contract - but even more so that they can relax. When the body's muscles have used up all their energy, they stiffen in a contraction that we call rigor mortis.
Slime molds are fascinating organisms. They can transport their food along paths, just like ants, and they find their own way. They often take even the shortest route from A to B. And for their reproduction, they create spores in special spore boxes (below on the photo). A spore develops into an amoeba, looks like a crawling mucus and sheds fruit in all sorts of colors.
What makes a person a person? Philosophers and theologians have looked into this question for thousands of years without finding an answer. But if you take the question literally, the answer is fairly easy to find. Here is a list of the most important ingredients of a person. For the sake of convenience we assume a person weighing 70 kilos.