NASA astronauts Bob Behnken and Chris Cassidy ventured out on their third spacewalk over the past few weeks to replace outdated batteries with more powerful new ones.
Large-scale oceanic phenomena are complicated and often involve many natural processes. Tropical instability wave (TIW) is one of these phenomena.
Pacific TIW, a prominent prevailing oceanic event in the eastern equatorial Pacific Ocean, is featured with cusp-shaped waves propagating westward at both flanks of the tropical Pacific cold tongue.
The forecast of TIW has long been dependent on physical equation-based numerical models or statistical models. However, many natural processes need to be considered for understanding such complicated phenomena.
A team from the Cockrell School of Engineering at the University of Texas at Austin have developed a new kind of battery that mixes the best of both worlds of liquid- and solid-state batteries. The design is the first all-liquid metal battery that can work at room temperature and is claimed to outperform lithium-ion batteries.
Liquid metal batteries are less susceptible to wearing out than solid batteries because dendrites don’t form and damage the components. The only downside is, most of these batteries need to be heated to at least 240°C (464°F) to keep the metals liquid and the equipment required to do that is bulky and energy-consuming.
For the study, published in the journal Advanced Materials, the UT team examined alloys that could remain liquid at useful temperatures. They decided to use a gallium-indium alloy for the cathode and a sodium-potassium alloy for the anode, which was able to stay liquid at 20°C (68°F). The researchers say it’s the lowest operating temperature ever recorded for a liquid-metal battery.
What’s the most dangerous thing in a fire?
If you think it’s the flames or the heat, that’s understandable: those are dangerous, too. But both from a victim’s and a firefighter’s perspective, the deadliest enemy is smoke.
The United Arab Emirates (UAE) will launch its first-ever interplanetary mission today (July 19), and you can watch the historic liftoff live.
The Emirates Mars Mission, also known as Hope, is scheduled to launch atop an H-IIA rocket from Japan’s Tanegashima Space Center today at 5:58 p.m. EDT (2158 GMT; 6:58 a.m. July 20 Japan Standard Time. You can follow the action live here at Space.com courtesy of the UAE Space Agency and the Dubai One news channel, or directly via the latter two organizations here.
Food for thought.
How does AI powered Robotics cause a mayhem? Read why the cobots are so dangerous, to the mankind, and what would happen if Artificial Intelligence powered Robots are programmed to kill humans.
Do you agree?
Elon Musk may be a strong proponent of all things tech. But he’s far from positive on its implications for the jobs market.
In fact, the Tesla CEO says one of tech’s great developments — artificial intelligence — could spell the end of many jobs altogether.
Continue reading “Elon Musk: ‘A.I. will make jobs kind of pointless’ — so study this” »
The biotech Mesoblast is starting a compassionate use study of its stem cell product for kids with a severe offshoot of COVID-19.
The cellular drug in this case is remestemcel-L (more below).
While most children fare better than adults in dealing with COVID-19, the rare subset of kids with COVID-19 for this study have more severe disease than the average COVID patient and some die.
The historic moment when Shepard and Mitchell deploy the US flag on the lunar surface. The video was shot at 12 frames per second, but this video is presented at 24 frames per second.
Scientists at Harvard University and the Black Hole Initiative (BHI) have developed a new method to find black holes in the outer solar system, and along with it, determine once-and-for-all the true nature of the hypothesized Planet Nine. The paper, accepted to, highlights the ability of the future Legacy Survey of Space and Time (LSST) mission to observe accretion flares, the presence of which could prove or rule out Planet Nine as a black hole.
Dr. Avi Loeb, Frank B. Baird Jr. Professor of Science at Harvard, and Amir Siraj, a Harvard undergraduate student, have developed the new method to search for black holes in the outer solar system, based on flares that result from the disruption of intercepted comets. The study suggests that the LSST has the capability to find black holes by observing for accretion flares resulting from the impact of small Oort cloud objects.
“In the vicinity of a black hole, small bodies that approach it will melt as a result of heating from the background accretion of gas from the interstellar medium onto the black hole,” said Siraj. “Once they melt, the small bodies are subject to tidal disruption by the black hole, followed by accretion from the tidally disrupted body onto the black hole.” Loeb added, “Because black holes are intrinsically dark, the radiation that matter emits on its way to the mouth of the black hole is our only way to illuminate this dark environment.”
