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Kelly R. MacGregor

Professor of Geology, Macalester College
As a geomorphologist, I study the forces that shape the physical surface of our planet. I measure active processes in the field (such as glacier motion, subglacial erosion, water velocity, and sediment transport), and use these data to constrain numerical models of landscape evolution over geologic timescales. My current research focuses on understanding the role of glaciers in shaping alpine landscapes. I use tools such as GPS to understand how glaciers behave over daily to annual timescales, and numerical models to examine their role in creating the fantastic mountainous landscapes we see today. In addition to my work on glaciers, I am interested in the effects of dams on sediment and water transport in river systems. By looking at historical data and making measurements of current river dynamics, we can quantify changes in sediment transport, which has important implications for riparian habitats over time. I teach a wide range of classes, including Geomorphology, Rivers and the Environment, Environmental Geology, History and Evolution of the Earth, and Glaciers and Climate.

Why does everything look flat even though the Earth is round?

Nov 12, 2024 04:47 am UTC| Insights & Views Science

Ever since the ancient Greeks first made observations of the circular Moon and the skies, scientists have known that the Earth is a sphere. Weve all seen beautiful images of the Earth from space, some photographed by...

Economy

AMD Cuts 1,000 Jobs Amid Declining Gaming Sales and Lower-than-Expected Revenue Outlook for Q4

AMDs global workforce sees a 4% reduction after the companys Q3 results fell short of expectations, driven by a dramatic 69% drop in gaming revenue. This layoff decision is part of AMDs strategy to focus on high-growth...

Tencent’s Q3 Profit Rockets 47% as Gaming and AI Surge Despite Revenue Hitting a Snag

Tencent Holdings Ltd delivered a striking 47% profit leap in Q3, reaching 53.23 billion yuan, with major boosts from gaming, AI tools, and high-demand ad services. Revenue rose to 167.19 billion yuan but fell slightly...

China Slams US TSMC Restrictions, Claims Weaponizing Tech to Inflame Strait Tensions

Chinas Taiwan Affairs Office condemned recent U.S. restrictions on TSMC chip exports to Chinese firms, claiming the U.S. is weaponizing Taiwans tech industry to increase Taiwan Strait tensions. This statement marks Chinas...

SoftBank Teams With Nvidia To Bring Japan’s Largest AI Supercomputer With Blackwell Chip Power

SoftBank Group Corp., in collaboration with Nvidia Corp., is set to unveil Japans largest AI supercomputer powered by advanced Blackwell chips. This landmark project is a bold stride toward positioning Japan as a leader in...

Instacart Lowers Q4 Forecasts as Holiday Spending Softens, Intensifying Online Delivery Competition

Instacart has reduced its fourth-quarter outlook, forecasting lower gross transaction value and core profit amid cooling consumer demand and stiffening competition in the online delivery market. The company now anticipates...

Politics

Jack Smith and Special Counsel Team to Step Down as Trump Prepares to Take Office: ‘The End of an Era!’

Special Counsel Jack Smith and his investigative team are reportedly planning to step down from their roles ahead of President-elect Donald Trumps upcoming inauguration. This move comes as Trump prepares to re-enter the...

The Guardian Abandons X, Calling It 'Toxic' After Trump Victory: ‘We’re Done With This Platform’

The Guardian has announced it will no longer post content on X, the social media platform formerly known as Twitter. The move comes in the wake of Donald Trumps recent election victory, with the British newspaper citing...

Shelley Luther Triumphs: Salon Owner Who Defied COVID Lockdown Wins Texas State House Seat in Stunning Victory

Shelley Luther, the Texas salon owner who made headlines in 2020 for defying COVID-19 lockdown restrictions, has now secured a seat in the Texas House of Representatives. Running as a Republican, Luther won the seat in...

Trump Teases 2028 Run, Says House Republicans ‘Better Figure Something Out’ in Playful Jab

In characteristic fashion, former President Donald Trump stirred the political pot this week by making a playful comment about a potential 2028 presidential run. During a recent event, Trump hinted he might not throw his...

‘Congratulations, Mr. President!’ Biden Reaches Across the Aisle to Acknowledge Trump’s Victory in Stunning Move

In a gesture that has caught the attention of political observers nationwide, President Joe Biden has formally congratulated Donald Trump on his victory. The move, considered by many as a significant bipartisan moment,...

Science

Blue Origin Prepares to Test New Glenn Rocket, Set to Rival SpaceX's Falcon Rockets

Blue Origin is making significant strides toward testing its New Glenn rocket, designed to compete with SpaceXs Falcon lineup. With seven BE-4 engines producing 3.8 million pounds of thrust, the New Glenn is set to test...

SpaceX’s $2.9 Billion Moon Ship Reveals Spacious Design for Future Lunar Missions

SpaceXs latest prototype of its Starship Human Landing System (HLS) offers an inside look at the spacious, two-story design that could soon carry astronauts to the Moon. A central feature in NASAs Artemis program, this...

CDC Urges Second COVID-19 Vaccine for Seniors: ‘Protect Your Health This Season!’ Experts Say It’s Critical

In a recent public health announcement, the Centers for Disease Control and Prevention (CDC) recommended that individuals aged 65 and older receive a second dose of the 2024-2025 COVID-19 vaccine. This additional dose, the...

Breakfast Secrets: 'Fiber-rich Foods Are the Key to Weight Loss!' Experts Reveal Shocking Truth

Health experts often emphasize the importance of a balanced diet combined with regular exercise for weight management. However, for many, achieving these goals can be a daunting challenge. Instead of drastic food...

Scabies Surge Sparks Alarm: Doctors Warn Brits, 'Don't Ignore That Rash!'

Doctors in the United Kingdom are sounding the alarm over a dramatic rise in scabies cases, urging residents not to dismiss any signs of the itchy skin condition. Recent data shows that hospitals detected approximately...

Technology

Don Lemon Drops Bombshell: ‘I’m Done with Twitter!’ as He Bids Farewell to Platform in Shocking Exit

Don Lemon has announced he is leaving X, the social media platform formerly known as Twitter. The former CNN anchor, who has been an active and often polarizing voice on the platform, revealed his decision to step away,...

Meta's Threads to Launch Ads in 2025, Poised to Steal X's Advertisers

Meta Platforms plans to roll out advertisements on its Threads app starting in early 2025, strategically positioning itself to lure advertisers from X, formerly Twitter. With Threads reaching 275 million active users, Meta...

Tesla’s 6th Cybertruck Recall Ignites Safety Concerns with Drive Power Loss Affecting Thousands

In a sweeping recall, Tesla addresses a critical inverter flaw in over 2,400 Cybertrucks, risking sudden drive power loss in specific models. Issued by the NHTSA, this sixth recall for the model requires physical repairs...

Shiba Inu Burn Rate Drops Sharply, Yet Shibarium Adoption Hits Record High

Shiba Inu (SHIB) sees its burn rate plummet by 94% in 24 hours amid price consolidation after a massive rally. Despite this, the meme coins adoption soars as Shibarium surpasses 500 million transactions, signaling strong...

BYD Aims to Rival Tesla in South Korea’s Electric Vehicle Market with 2025 Launch

BYD is gearing up to introduce its Atto 3 and Seal electric vehicles in South Korea by early 2025, signaling the Chinese automakers entry into the passenger car market. The launch aims to capture South Koreas rapidly...