logo
Arizona State University's forensic program is seeing growth due to innovative, unique teaching methods

Arizona State University's forensic program is seeing growth due to innovative, unique teaching methods

Yahoo26-03-2025

The Brief
ASU's forensics program is seeing steady growth as the program opens up its evidence locker on the Glendale campus to us for an inside look.
Assistant Professor Jacob Harris says the explosion of forensic-related TV shows and innovative teaching methods at the school have helped the program grow.
They are providing future crime solvers new, innovative, hands-on techniques for the real-world.
PHOENIX - Stepping inside Arizona State University's School of Interdisciplinary Forensics is like the set of a Crime Scene Investigation show.
This week, the school is opening the doors of its evidence locker at the Glendale campus to give the public an inside look.
Local perspective
Take a step inside Arizona State University's evidence locker and you'll see a real-life replica of the world of forensics.
"So forensics is essentially where science meets the law," said Jacob Harris, Assistant Professor at the ASU School of Interdisciplinary Forensics (SIF).
The SIF program at ASU gives students hands-on experience with forensics from DNA and fingerprint analysis, toxicology, bone-surface trauma and many other real-world scenarios.
"These are examples of sharp force trauma generated with a small six-inch, straight-edged metal knife," Harris demonstrates.
Analyzing the entry and exit wounds of a bullet going through a skull is another lesson.
What we know
"Forensic is a big word. It encompasses a lot of different topics. You could be working with animal remains, you could be working with human remains, you could be working with digital data, you could be working with living people," Harris said.
He adds that shows like C.S.I. and N.C.I.S have created a bigger draw to the program, and this week the public is invited to test it out.
"You could involve working with ballistics, psychology, bone surface modification, taxonomy, ethnography," Harris said.
He recreates crime scenes using test dummies and skeletons, the rest is up to the student.
Why you should care
"They have to catalog evidence. They have to find evidence. They have to produce probability maps to try to get an idea of where the most likely location is of those grave locations, then you tend to get things like little pieces of tooth, or you'll get coins, little bits of clothing, items that you might have missed when you're excavating," he said.
ASU's program is challenging the field of forensics, finding new innovative ways to solve crimes.
"These methods are based on data, they're based on statistics, and they're providing more robust techniques and methods that are less, I'll say, subject to analyst error."

Orange background

Try Our AI Features

Explore what Daily8 AI can do for you:

Comments

No comments yet...

Related Articles

NASA's Psyche Spacecraft, Exploring Solar System Origins, Is Back on Track after Thrusters Lost Power
NASA's Psyche Spacecraft, Exploring Solar System Origins, Is Back on Track after Thrusters Lost Power

Yahoo

time6 days ago

  • Yahoo

NASA's Psyche Spacecraft, Exploring Solar System Origins, Is Back on Track after Thrusters Lost Power

The robotic spacecraft Psyche has regained propulsion after a snag cut its propellant system in April. Engineers had to switch to a backup system, and full thruster operations resumed last week. The satellite is now on schedule to fly by Mars in May 2026—and then slingshot into orbit around a very unusual asteroid (also named Psyche) in August 2029. The propulsion problem had put this schedule, and indeed the entire mission, in jeopardy for a while. 'In another few weeks, if some things we tried didn't work, the blood pressure would have started to rise,' says Linda Elkins-Tanton, the mission's principal investigator and a planetary scientist at Arizona State University. About 4.5 billion years ago, our solar system was a cloud of gas and dust with no used to think planets grew very slowly, over hundreds of millions of years, as gravity gradually clumped the gas and dust together. But more recent evidence points to a much faster process involving high-energy hit-and-run collisions among dust, pebbles and rocks that crashed together and then got blown apart within a short time. Some of these crashes might have melted metals to form a core (such as the one found at the center of Earth) and surrounded it with a rocky rind. Our planet's core is many hundreds of miles deep, however—too far down to observe directly and accurately. But the asteroid Psyche, circling the sun between Mars and Jupiter, may have an exposed metal core. Radar reflections indicate this is at least partially so, says Jim Bell, an Arizona State University planetary scientist, who is in charge of the Psyche spacecraft's multispectral imaging cameras. 'If it was covered by rock, we wouldn't get the signal that we're seeing,' he says. That signal indicates substances composed primarily of nickel and iron. So a flyby of the asteroid could provide the first close-up view of what a planet's core looks like and answer questions about how it formed. [Sign up for Today in Science, a free daily newsletter] The problem with the craft's xenon gas thrusters appeared to be caused by a defective valve, and when engineers switched to a second fuel line, the craft regained motion. When Psyche meets up with its asteroid namesake in 2029, the probe's instruments should be able to detect any uncovered core metal that collisions have blasted clean of rock. The orientation of magnetic particles in that core, like tiny compass needles, could indicate whether the asteroid once had a magnetic dynamo, as Earth's core does. Remarkably, if there were impacts of debris on the molten metal, they could have splashed up and then frozen, leaving sharp cliffs for spacecraft cameras to show us. The asteroid Pysche orbits at about three astronomical units, or AU, from the sun (Earth's orbit is at one AU). It's often described as 'potato shaped,' with a diameter of 140 miles and a surface area of 64,000 square miles.

NASA's Psyche Spacecraft, Exploring Solar System Origins, Is Back on Track after Thrusters Lost Power
NASA's Psyche Spacecraft, Exploring Solar System Origins, Is Back on Track after Thrusters Lost Power

Scientific American

time6 days ago

  • Scientific American

NASA's Psyche Spacecraft, Exploring Solar System Origins, Is Back on Track after Thrusters Lost Power

The robotic spacecraft Psyche has regained propulsion after a snag cut its propellant system in April. Engineers had to switch to a backup system, and full thruster operations resumed last week. The satellite is now on schedule to fly by Mars in May 2026—and then slingshot into orbit around a very unusual asteroid (also named Psyche) in August 2029. The propulsion problem had put this schedule, and indeed the entire mission, in jeopardy for a while. 'In another few weeks, if some things we tried didn't work, the blood pressure would have started to rise,' says Linda Elkins-Tanton, the mission's principal investigator and a planetary scientist at Arizona State University. Why It Matters About 4.5 billion years ago, our solar system was a cloud of gas and dust with no planets. Astronomers used to think planets grew very slowly, over hundreds of millions of years, as gravity gradually clumped the gas and dust together. But more recent evidence points to a much faster process involving high-energy hit-and-run collisions among dust, pebbles and rocks that crashed together and then got blown apart within a short time. Some of these crashes might have melted metals to form a core (such as the one found at the center of Earth) and surrounded it with a rocky rind. Our planet's core is many hundreds of miles deep, however—too far down to observe directly and accurately. On supporting science journalism If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today. But the asteroid Psyche, circling the sun between Mars and Jupiter, may have an exposed metal core. Radar reflections indicate this is at least partially so, says Jim Bell, an Arizona State University planetary scientist, who is in charge of the Psyche spacecraft's multispectral imaging cameras. 'If it was covered by rock, we wouldn't get the signal that we're seeing,' he says. That signal indicates substances composed primarily of nickel and iron. So a flyby of the asteroid could provide the first close-up view of what a planet's core looks like and answer questions about how it formed. What's Next The problem with the craft's xenon gas thrusters appeared to be caused by a defective valve, and when engineers switched to a second fuel line, the craft regained motion. When Psyche meets up with its asteroid namesake in 2029, the probe's instruments should be able to detect any uncovered core metal that collisions have blasted clean of rock. The orientation of magnetic particles in that core, like tiny compass needles, could indicate whether the asteroid once had a magnetic dynamo, as Earth's core does. Remarkably, if there were impacts of debris on the molten metal, they could have splashed up and then frozen, leaving sharp cliffs for spacecraft cameras to show us. More about Psyche The asteroid Pysche orbits at about three astronomical units, or AU, from the sun (Earth's orbit is at one AU). It's often described as 'potato shaped,' with a diameter of 140 miles and a surface area of 64,000 square miles.

Groundwater in the Colorado River basin won't run out — but eventually we won't be able to get at it, scientists warn
Groundwater in the Colorado River basin won't run out — but eventually we won't be able to get at it, scientists warn

Yahoo

time19-06-2025

  • Yahoo

Groundwater in the Colorado River basin won't run out — but eventually we won't be able to get at it, scientists warn

When you buy through links on our articles, Future and its syndication partners may earn a commission. Stark new satellite data reveal that the Colorado River basin has lost huge amounts of groundwater over the last few decades, with some research suggesting that this groundwater could run out by the end of the century. But is that really the case? And if so, what could be done to prevent that happening? While groundwater is being depleted, it's unlikely the water will ever run out completely. However, continued drainage of the basin could make the water table fall so far it's basically inaccessible, experts told Live Science. The Colorado River snakes through seven U.S. states (Wyoming, Colorado, Utah, New Mexico, Nevada, Arizona and California) and two Mexican states (Baja California and Sonora). Some 40 million people, including those in Phoenix and Las Vegas, depend on it for their water needs. But as supplies of this surface water have dried up over the past two decades — reaching record lows — more and more people have been pumping groundwater from far below the surface, mainly for agricultural use. To get a better idea of how much groundwater is being extracted, Jay Famiglietti, director of science for the Arizona Water Innovation Initiative at Arizona State University, and his colleagues turned to data from NASA's Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On satellite missions. These satellites track changes in Earth's gravity field to measure shifts in the amount of water above and below the ground, and when combined with data on snowpack, surface water and soil moisture, this information can allow scientists to estimate how much groundwater has been depleted. The researchers estimate that since 2003, pumping from wells has drained about 28 million acre feet (34 cubic kilometers) of groundwater from the Colorado River Basin. This is akin to the capacity of Lake Mead, the largest U.S. reservoir, which sits behind the Hoover Dam on the Colorado River. The study was published May 27 in the journal Geophysical Research Letters. About three-quarters of the groundwater depletion is happening in the river's lower basin, largely in Arizona, where water is pumped from desert aquifers to irrigate farmland, according to the study. In these largely rural areas, farms aren't usually hooked up to municipal water systems, and instead rely on water pumped from wells on the property. Because the wells are private, there is often no municipal, county- or state-level measurement of how much water they are drawing up. Famiglietti and his colleagues estimate that annual groundwater losses in the basin averaged more than 1.2 million acre-feet (1.5 cubic kilometers) and if the trend continues, it could lead to water shortages and limit food production. "We're passing a critical point where it is getting more and more expensive to go deeper into the aquifer, and the water quality is dropping," Famiglietti said. Dozens of wells have dried up in the area. Collapsing aquifers have caused land subsidence, and created fissures. Ryan Mitchell, chief hydrologist at the Arizona Department of Water Resources, who was not involved in the new study, told Live Science that he welcomes the paper's findings and is concerned about the levels of estimated groundwater depletion in some areas. However, he takes issue with a sentence in the paper that suggests that an Arizona Department of Water Resources simulation indicated "complete depletion by the end of the century." He said the simulations don't indicate complete depletion of groundwater at all, let alone by the end of the century. The groundwater won't run out, he said, but neither GRACE satellite data nor measurements of water use will tell us exactly how much water is left in aquifers. "It's almost like it's an unknowable number in the same way that if someone said how many grains of sand are on the beach, you could make some assumptions and make some guesses but you can never actually know the exact amount of sand grains," Mitchell said. Bridget Scanlon, a research professor in the Bureau of Economic Geology at the University of Texas at Austin, and her team recently used GRACE data to assess the implications of drought in the Colorado River basin. They saw similar patterns, finding that there was a period of high groundwater use as irrigation expanded between the 1940s and 1970s. Then, the amount of groundwater recovered during a wet period in the early 1980s and 1990s. Related: Atlantic ocean currents are weakening — and it could make the climate in some regions unrecognizable But since then, the picture has differed depending on how areas are managed. In "active management areas," or areas where water use is monitored, the levels of groundwater have stayed roughly level. In these areas, groundwater is pumped, but based on how much is drawn up, management agencies can divert more water to the depleted area to filter back down to the aquifer. In unmanaged areas, no agency tracks how much groundwater is pumped, so agencies don't know when to replenish the aquifers. High extraction in unmanaged areas is driving the overall draining of groundwater, Scanlon told Live Science. "We can't manage what we don't measure," he said. "It shows that if you have rules in place and you keep a close eye on water use and you actively manage it, you can kind of keep it at a sustainable level." One thing is for sure: Waiting for precipitation to end the drought and replenish aquifers won't be enough. Studies imply that the flow of the Colorado River is expected to continue to decline thanks to climate-linked reductions in snowfall and rainfall — and that means there will be less surface water to use, less water to recharge aquifers and more reason to extract water from underground. Drilling deeper wells is one solution, but there are problems with that, Famiglietti said. At some point, it will cost millions of dollars for a deep-enough well that will have high energy costs to pump water, he said, and that water is likely to require treatment. "As you go deeper into the groundwater, that water has been sitting around in contact with soil and rocks for a long time, so it's dissolving solids and salts," Famiglietti said. This can lead to water that is salty, poor-tasting or that contains high levels of arsenic. "And because these are often refilled by agricultural water, they [are] collecting higher concentrations of pesticides and fertilizer," Famiglietti said. Another option is to reduce water use, by, for example, changing what is farmed, to shift from water-intensive crops like alfalfa, Famiglietti said. "It can't be business as usual," he said. "We have to think about what our priorities are for water use." "I'm as concerned about tomorrow as I am about 100 years from now," he said. 'It's very clear that we need more groundwater management in the lower basin, which is mostly in Arizona. Only 18% by area is managed, and there's an awful lot of depletion happening outside of those areas." Every expert Live Science talked with suggested that extending the area covered by active water management areas would help — first, by keeping tabs on what is being used where, and then trying to replace what is used. As part of such schemes, water could be brought in from elsewhere, Scanlon said. For example, this already happens when San Antonio buys water and pipes it from East Texas more than 150 miles (240 kilometers) away. RELATED STORIES —Atlantic ocean currents are weakening — and it could make the climate in some regions unrecognizable —Over half of the world's largest lakes and reservoirs are losing water —'Precipitation, the source of all fresh water, can no longer be relied upon': Global water cycle pushed out of balance 'for 1st time in human history' "Groundwater is a finite resource," Mitchell said. "You need to be able to let it recharge naturally or be able to replenish what you use. He said Scanlon's research shows that "we're doing OK in the active management areas, and we're not doing so hot in the areas where we don't have some kind of framework in place." A legislative bill to extend the areas that are actively managed has been proposed in Arizona, but similar ones have stalled after facing opposition. Those opposed say restricting water doesn't protect existing agricultural use of groundwater and will stifle economic growth. Some also object to water use being decided at the state level when they would prefer smaller water districts with locally elected directors. "We're not trying to spy on anyone; we just want to know what the water uses are," Mitchell said. "But it's hard because trust in governments is at an all-time low. We are trying to put things in place to help the mom-and-pop domestic wells — those folks who can't afford to drill 2,000-foot [600 meters] wells because it's just too deep and too expensive. We want to try to help them protect their water resources."

DOWNLOAD THE APP

Get Started Now: Download the App

Ready to dive into a world of global content with local flavor? Download Daily8 app today from your preferred app store and start exploring.
app-storeplay-store