According to scientists reef sharks have dropped sharply near populated islands in the Pacific Ocean. The survey by the University of Hawaii showed that the numbers were drastically lower near populated islands in Hawaii, the Mariana Archipelago and American Samoa, compared to more pristine, remote areas in the ocean. As said lead author Marc Nadon from the Joint Institute for Marine and Atmospheric Research at the University of Hawaii they estimate that reef shark numbers have dropped substantially around populated islands, generally by more than 90 percent compared to those at the most untouched reefs.
Dark matter is one of the greatest cosmic mysteries of our time, an invisible, intangible material thought to make up five-sixths of all matter in the universe. Scientists currently think it is composed of a new type of particle, one that interacts normally with gravity but only very weakly with all the other known forces of the universe. As such, dark matter is detectable only via the gravitational pull it generates.
Magnetic phenomenon that causes auroras on Earth has now surprisingly been discovered creating giant magnetic bubbles around Venus, a planet without a magnetic field. The Northern and Southern Lights on Earth are caused by magnetic lines of force breaking and connecting with each other. This process, known as magnetic reconnection, can explosively convert magnetic energy to heat and kinetic energy.
A newly described relative of Tyrannosaurus rex is the largest known feathered anima. The feathered meat-eating dinosaur lived about 125 million years ago. This group of dinosaurs is known as the Tyrannosauroids. Tyrannosaurus rex and its gigantic cousins lived until around 65 million years ago. Xing Xu and colleagues from the Chinese Academy of Sciences in Beijing have now described three specimens of Yutyrannus, which represents an early example of the Tyrannosauroid form.
A new type of hominid foot bone has been discovered in the Afar region of Ethiopia, showing that Lucy, the famous early human ancestor, had company. The 3.4 million-year-old bones have been shown not to belong to Australopithecus afarensis, but instead to a creature that spent much of its time in trees. It hasn’t yet been assigned a species, as no skull or teeth have yet been found. According to Dr. Yohannes Haile-Selassie of the Cleveland Museum of Natural History the Burtele partial foot clearly shows that at 3.4 million years ago, Lucy’s species, which walked upright on two legs, was not the only hominin species living in this region of Ethiopia.
Researchers have discovered a new, as of yet unnamed, species of shark. It looks just like the scalloped hammerhead shark, curtailing efforts to save that endangered species. As said researchers at Nova Southeastern University in Florida the new look-alike hammerhead species, first discovered off the eastern United States, has been found more than 4,300 miles away near the coast of southern Brazil proving the unnamed species is widespread.
New study suggests that there should be billions of habitable, rocky planets around the faint red stars of our galaxy. The findings are based on a survey of 102 stars in a class called red dwarfs. Red dwarfs are fainter, cooler, less massive and longer-lived than the sun, and are thought to make up about 80 percent of the stars in our galaxy. Using the HARPS spectrograph on the 3.6-metre telescope at the European Southern Observatory’s La Silla Observatory in Chile, astronomers found nine planets slightly larger than Earth over a six-year period.
According to a new study that may contradict the reigning moon-formation theory far more of the moon may be made of material from Earth than previously thought. Scientists have suggested that the moon was created when a Mars-size object named Theia collided with Earth 4.5 billion years ago, with more than 40 percent of the moon made up of debris from this impacting body. However, researchers had expected this alien world to be chemically different from Earth, and past studies have revealed that the moon and Earth appear quite similar when it comes to versions of elements called isotopes, more so than might be suggested by the current Theia model.
The team of researchers from the University of Leicester (UK) and Monash University in Australia investigated how some black holes grow so fast that they are billions of times heavier than the sun. Professor Andrew King from the Department of Physics and Astronomy, University of Leicester, said that almost every galaxy has an enormously massive black hole in its center. Our own galaxy, the Milky Way, has one about four million times heavier than the sun.