Latest news with #DanielSlim
Yahoo
5 days ago
- Science
- Yahoo
A meteor may have led to the formation of the Grand Canyon, new study says
A meteor may have led to the formation of the Grand Canyon, a new study has found. While many Americans are familiar with the Grand Canyon's beauty and uniqueness, they may not be aware of the story behind its formation. The Colorado River may have etched the canyon one mile deep, as rocky debris transported in floods did most of the carving, according to the Grand Canyon Conservancy. But what caused the flooding? A study published in Geology on Tuesday tied another Arizona landmark, the Meteor Crater, to the formation of the Grand Canyon. A meteor may have led to the formation of the Grand Canyon, a new study has found (Daniel Slim/AFP via Getty Images) The study hypothesized the Meteor Crater, which was formed 56,000 years ago, triggered landslides in the Grand Canyon that blocked the Colorado River and formed a paleolake — a lake that has existed in the past— in the canyon. Geologists have long wondered how and when driftwood found in Stanton's Cave in the Grand Canyon got there, as the mouth of the cave is 150 feet above the river. There are also lake sediments found in the cave. "It would have required a 10-times bigger flood level than any flood that has happened in the past several thousand years,' one of the study's authors, University of New Mexico Distinguished Professor Emeritus Karl Karlstrom, said in a press release Tuesday. He continued: 'Or maybe they are very old deposits left as the river carved down, or maybe they floated in from a paleolake caused by a downstream lava dam or landslide dam? We needed to know the age of the cave deposits.' A study published Tuesday tied the Meteor Crater to the formation of the Grand Canyon (Daniel Slim/AFP via Getty Images) The study hypothesized the Meteor Crater, which was formed 56,000 years ago, triggered landslides in the Grand Canyon that blocked the Colorado River and formed a paleolake, in other words, a former lake, in the canyon () The study found the driftwood to be 56,000 years old, the same geologic age as the asteroid impact and the landslide dam. Researchers suggested because the landslide appears to have the same age as Meteor Crater, the asteroid impact blast caused the landslide. The paleolake formed from the landslide, which dammed the Colorado River. Caves, such as Stanton's Cave, were flooded by the paleolake.
Newsweek
07-07-2025
- Climate
- Newsweek
Lake Mead Warning Issued Over 'Dangerously Hot Conditions'
Based on facts, either observed and verified firsthand by the reporter, or reported and verified from knowledgeable sources. Newsweek AI is in beta. Translations may contain inaccuracies—please refer to the original content. The National Weather Service (NWS) issued an extreme heat watch on Monday for the Lake Mead National Recreation Area and surrounding regions as "dangerously hot conditions" are forecasted for Wednesday. Why It Matters The U.S. Centers for Disease Control and Prevention (CDC) says that extreme heat can cause heat-related illnesses, particularly in young children, the elderly, and those with chronic health issues. Common symptoms of heat exhaustion include intense sweating, muscle cramps, dizziness, and nausea. The agency estimates that over 700 people die each year in the U.S. from extreme heat exposure. What To Know The alert covered parts of southeast Arizona, as well as a neighboring portion of northwest Arizona, and southeast California—including cities such as Lake Havasu City, Bullhead City, Needles, Mohave Valley, and the Hoover Dam area. Forecasts indicated that afternoon highs could reach between 110- and 120-degrees Fahrenheit along the Colorado River Valley, prompting the NWS to advise residents and visitors to stay indoors and take immediate precautions to prevent heat-related illnesses. The agency described these temperatures as "dangerously hot conditions." "High temperatures in the lower elevations of southern Mohave County will be around 110 to 115 degrees," the alert added. The NWS advised residents in affected areas to stay well-hydrated, stay out of the sun and in and air-conditioned room, and to check up on neighbors and relatives. It also warned that car temperatures could reach "lethal temperatures" within minutes, and that young children and pets should not be left in vehicles unattended. Aerial view of Boulder Basin, the northwestern arm of Lake Mead, is seen on July 3. Aerial view of Boulder Basin, the northwestern arm of Lake Mead, is seen on July 3. Daniel Slim/AFP via Getty Images What People Are Saying The NWS forecast office, Las Vegas, wrote on X, formerly Twitter, on Monday: "Temperatures will continue to increase each day through mid-week with HeatRisk increasing to Major across southern Mohave County and the Colorado River Valley on Wednesday. As such, an Extreme Heat Watch has been issued for the aforementioned areas on Wednesday." The NWS wrote on X last month: "During hot and humid weather, your body's ability to cool itself is challenged in ways you may not expect. When your body heats too rapidly, or when too much fluid or salt is lost through dehydration or sweating, you may experience a heat-related illness. Stay Weather-Ready by learning the symptoms of Extreme Heat exposure and the appropriate responses." What Happens Next? At the time of writing, the extreme heat watch was in effect from Wednesday morning through Wednesday evening. The NWS issues regular forecast updates on its website.
Politico
01-07-2025
- Politics
- Politico
Pentagon halting some promised munitions for Ukraine
The decision was driven by the Pentagon's policy chief, Elbridge Colby, and was made after a review of Pentagon munitions stockpiles. A review of Pentagon munitions stockpiles led to concerns that the total number of artillery rounds, air defense missiles and precision munitions was sinking. | Daniel Slim/AFP via Getty Images By Paul McLeary Jack Detsch and Joe Gould 07/01/2025 04:30 PM EDT The Pentagon has halted shipments of some air defense missiles and other precision munitions to Ukraine due to worries that U.S. weapons stockpiles have fallen too low. The decision was driven by the Pentagon's policy chief, Elbridge Colby, and was made after a review of Pentagon munitions stockpiles, leading to concerns that the total number of artillery rounds, air defense missiles and precision munitions was sinking, according to three people familiar with the issue. The initial decision to withhold some aid promised during the Biden administration came in early June, according to the people, but is only taking effect now as Ukraine is beating back some of the largest Russian barrages of missiles and drones at civilian targets in Kyiv and elsewhere.
