Antigravity — the idea that gravity can be shielded, modified, or reversed through technological means — has occupied a strange twilight zone between mainstream physics and classified military research for over a century. Dozens of major aerospace corporations openly researched gravity control in the 1950s, then went completely silent overnight. Pentagon grants went to university physicists who then vanished behind security clearances. Navy engineers filed patents for “craft using inertial mass reduction devices.” And a growing list of researchers in the field have died or disappeared under circumstances that have drawn FBI investigation and congressional scrutiny.
George S. Trimble, VP for Aviation and Advanced Propulsion at Glenn L. Martin, publicly stated in 1955: “Unlimited power, freedom from gravitational attraction, and infinitely short travel time are now becoming feasible.” In 1954, Aviation Report predicted “the first discs should be complete before 1960.” Between 1958 and 1960, all public conversation vanished — no explanation offered, no breakthrough announced.
Dead
Dr. Ning Li
1943 – 2021
Chinese-American physicist at UAH's Center for Space Plasma and Aeronomic Research. World's leading researcher in superconductivity-based gravity modification.
Theory: Rotating ions in a high-temperature superconducting disc (HTSD) could generate a gravitomagnetic field strong enough to neutralize gravity. Told Popular Mechanics: “A bowling ball placed anywhere above this disc would stay exactly where you left it.”
The DOD Grant: AC Gravity LLC received $448,970 from DOD in 2001. No results were ever published. Her son says she continued antigravity research for DOD after obtaining a top secret clearance — she simply could not discuss her work.
End: Struck by a vehicle on the UAH campus in 2014, causing permanent brain damage. Diagnosed with Alzheimer's. Died July 27, 2021. Her work is directly cited in DIA Defense Intelligence Reference Document #14.
Huntsville
DOD Grant
Top Secret
Hit by car
Dead
Amy Eskridge
1987 – 2022
Chemist, entrepreneur, and antigravity researcher. Graduated UAH, enrolled in Material Science PhD. Father was a retired NASA Marshall plasma physics engineer.
Claims: “We discovered antigravity, and our lives went to [expletive] and people started sabotaging us.” Co-founded the Institute for Exotic Science to publicly disclose antigravity technology.
Before death: Texted a former British intelligence officer: “If you see any report that I killed myself, I most definitely did not.” Reported being struck by a directed energy weapon, stalked by a man in a Lexus with changing plates, and receiving daily death threats.
Death: Officially ruled suicide by self-inflicted gunshot wound on June 11, 2022, age 34. No police reports, autopsy findings, or coroner's statements have been publicly released.
Huntsville
NASA Marshall
Ruled suicide
Missing
Maj. Gen. William Neil McCasland
b. ~1958
33 years in the U.S. Air Force. Commander of AFRL at Wright-Patterson AFB. Director of Special Programs at OSD AT&L — one of the most sensitive positions in the DoD acquisition hierarchy.
DeLonge connection: In a 2016 WikiLeaks email to John Podesta, Tom DeLonge wrote: “When Roswell crashed, they shipped it to the laboratory at Wright Patterson Air Force Base. General McCasland was in charge of that exact laboratory up to a couple years ago.”
Disappearance: Left his Albuquerque home on Feb 27, 2026 — 7 days after Trump's UAP disclosure order. Left behind his phone and prescription glasses. Took his wallet, hiking boots, and a .38-caliber revolver. FBI joined the search. No evidence of foul play found.
SAP Access
UAP Gatekeeper
Wright-Patterson
Dead
Mark McCandlish
1952 – 2021
Aerospace illustrator. Created detailed technical drawings of the alleged “Alien Reproduction Vehicle” (ARV) or “Fluxliner” based on claimed eyewitness accounts from Norton AFB in 1988.
Testimony: Testified at the 2001 Disclosure Project at the National Press Club and presented at the Alternative Propulsion Engineering Conference in 2020.
Death: Found dead April 13, 2021, in Redding, California. Ruled suicide by self-inflicted shotgun wound. Friends claimed he was about to provide testimony for a Senate UFO/UAP meeting.
ARV / Fluxliner
Ruled suicide
Classified
Thomas Townsend Brown
1905 – 1985
Founding figure of antigravity research. Discovered anomalous forces on charged X-ray tubes in the 1920s. Filed first antigravity patent in 1927.
Demonstrations: ~1953, conducted classified demonstration for military officials — 3-foot-diameter discs tethered to a central pole, energized with 150,000 volts, reaching speeds of several hundred miles per hour. Subject reportedly classified afterward.
Legacy: Mainstream science attributes effects to ionic wind (electrohydrodynamics). Brown claimed his effects persisted in vacuum. Spent later years in obscurity. Proponents note his most promising work was classified.
Naval Research Lab
Classified 1953
Alive
Eugene Podkletnov
b. ~1955
Russian ceramics engineer at Tampere University, Finland. Claimed 0.05–0.3% weight reduction above a rotating YBCO superconducting disc in 1992.
Controversy: Co-author disavowed the paper, lab director distanced the institution, and Podkletnov was expelled from his lab. All subsequent replication attempts — by NASA Marshall, U of Toronto, and BAE Systems — failed.
Impact: Despite failed replications, his claims attracted Boeing (GRASP program), BAE Systems (Project Greenglow), and the British Ministry of Defence.
NASA Marshall tested
Fired / discredited
Alive
Salvatore Cezar Pais
Active 2015–2023
Navy aerospace engineer who filed the “UFO patents” — including a “Craft using an inertial mass reduction device” that could purportedly “engineer the fabric of our reality.”
CTO intervention: Patent was initially rejected but granted after James Sheehy, the Navy's chief technology officer, warned the USPTO that “the Chinese military were developing similar technology.”
Testing: The Navy spent $500K+ testing the “Pais Effect” from 2016–2019. NAWCAD concluded “the effect could not be proven.” Patent expired in 2023 due to non-payment.
U.S. Navy
UFO Patents
Alive
David Grusch
Active 2023–present
Former intelligence officer. Testified before Congress in July 2023 that he “was informed in the course of my official duties of a multi-decade UAP crash retrieval and reverse-engineering program.”
Implications: While not using the term “antigravity,” his testimony implied exotic propulsion — stating recovered craft “may not be traveling through space as we understand it” and referencing “additional spatial dimensions.”
Official response: AARO's March 2024 report found “no verifiable evidence” supporting his claims.
Congressional testimony
Intelligence community
Dead
Ben Rich
1925 – 1995
Second director of Lockheed's Skunk Works. Multiple statements attributed to him suggest knowledge of exotic propulsion technology.
Attributed quote: “Jim, we have things out in the desert that are fifty years beyond what you can comprehend.” A letter from model kit designer John Andrews claims Rich responded that he believed “there are two types of UFOs, the ones we build, and the ones they build.”
Caveat: Rich's “E.T. back home” line was explicitly a running joke in his presentations, and researcher Norio Hayakawa has argued Rich has been “erroneously misquoted by the UFO community.”
Skunk Works
Disputed quotes
Both Ning Li and Amy Eskridge operated in the same ecosystem — both based in Huntsville, both connected to UAH and NASA Marshall, both researching antigravity, both dying under circumstances that attracted public scrutiny, roughly a year apart.
Huntsville, Alabama is the epicenter of American antigravity research. NASA Marshall Space Flight Center, the University of Alabama in Huntsville, and the U.S. Army's Redstone Arsenal all converge there, creating a unique ecosystem where mainstream aerospace engineering intersects with exotic propulsion research.
Gravity Research Foundation (1948–Present)
Founded by Roger W. Babson after his sister drowned — he blamed gravity. Initially an essay contest for “anti-gravity devices,” it evolved into a legitimate scientific competition. At least six future Nobel laureates have won the prize, including Stephen Hawking (1971), Roger Penrose (1975), and Frank Wilczek. The essay prize is still awarded as of 2025.
NASA Breakthrough Propulsion Physics (1996–2002)
Led by Marc G. Millis at NASA Glenn Research Center. Investigated warp drives, wormholes, quantum vacuum fluctuations, and gravity-electromagnetism interactions. Total investment: $1.554 million over seven years. The program selected five external projects, two in-house tasks, and one minor grant. Cancelled in 2002 when the Advanced Space Transportation Program was reorganized. No breakthroughs achieved.
BAE Systems Project Greenglow (1990s–2000s)
British Aerospace investigated whether antigravity could be used to levitate objects and aircraft. The British Ministry of Defence specifically asked the team to investigate Podkletnov's claims. Podkletnov's work was not replicated. Greenglow concluded in the mid-2000s with no practical gravity-control device produced.
Boeing GRASP Program (Early 2000s)
Boeing's Phantom Works ran GRASP — Gravity Research for Advanced Space Propulsion — to evaluate Podkletnov's gravity shielding claims. The company attempted to recruit Podkletnov directly but ran into Russian technology transfer restrictions. Boeing acknowledged the project's existence but denied funding it with company money, noting they could not comment on “black projects.”
DIA/AAWSAP Advanced Propulsion Studies (2007–2012)
The Advanced Aerospace Weapon Systems Applications Program, initiated by Senator Harry Reid with a $22 million DIA budget, produced 38 Defense Intelligence Reference Documents through Bigelow Aerospace Advanced Space Studies. Released via FOIA in 2022, these included papers on:
• Warp Drive, Dark Energy, and the Manipulation of Extra Dimensions
• Antigravity for Aerospace Applications
• The Role of Superconductors in Gravity Research (citing Ning Li's work)
• Advanced Space Propulsion Based on Vacuum Engineering
• High-Frequency Gravitational Wave Generation and Detection
Navy “UFO Patents” — Salvatore Pais (2015–2023)
Pais filed patents including a “Craft using an inertial mass reduction device” (US10144532B2). Initially rejected by the USPTO, the patent was granted only after the Navy's chief technology officer intervened, warning that “the Chinese military were developing similar technology.” The Navy spent over $500,000 testing the “Pais Effect” from 2016–2019. NAWCAD concluded “the effect could not be proven.” Patent expired in 2023.
DARPA Casimir Effect & the Warp Bubble (2020s)
DARPA launched a $10 million program to manipulate the Casimir effect — a quantum electrodynamic force. In 2021, Dr. Harold “Sonny” White (formerly of NASA Eagleworks) reported accidentally identifying a nano-scale structure predicted to generate negative vacuum energy density — a “real nanoscale warp bubble.” Published in the European Physical Journal. As of May 2026, a startup called Casimir launched with a $12 million seed round to develop a “quantum energy chip” based on Casimir cavity structures.
Beginning with McCasland's disappearance on February 27, 2026 — seven days after Trump's UAP disclosure order — a broader pattern was identified connecting 11+ deaths and disappearances of researchers with ties to classified work.
~1921
T.T. Brown observes anomalous forces on charged X-ray tubes as an Ohio high school student
1927
Brown files first antigravity patent: “Method of Producing Force or Motion”
1948
Roger Babson establishes the Gravity Research Foundation
1952
Brown drafts Project Winterhaven; Cady investigation attributes effect to ionic wind
1953
Brown conducts classified demonstration for military officials — 3-foot discs at several hundred mph
1954
Aviation Report predicts antigravity discs “before 1960”
1955
George Trimble publicly predicts imminent gravity control
1956
“Electrogravitics Systems” classified report produced; “G-Engines Are Coming!” published in Young Men magazine
1958–60
All public discussion of gravity control abruptly ceases — no explanation, no breakthrough announced
1983
Ning Li emigrates to the United States from China
1990
“Electrogravitics Systems” report declassified
1991–93
Ning Li publishes groundbreaking papers on superconductor-gravity coupling at UAH
1992
Podkletnov publishes first gravity shielding claim (0.3% weight reduction)
1994
Alcubierre publishes warp drive metric
Mid-1990s
BAE Systems begins Project Greenglow
1996
Podkletnov's 2% claim leaks; he is fired. NASA BPP program begins
1997
Li co-authors Physica C paper with NASA Marshall employees (null result)
1999
Li leaves UAH, founds AC Gravity LLC
2001
AC Gravity receives $448,970 DOD grant; McCandlish testifies at Disclosure Project
2002
Grant period ends — no results published. Nick Cook publishes The Hunt for Zero Point. NASA BPP cancelled
2003
Li presents at MITRE with Redstone Arsenal co-author; claims “11 kW output effect” — then goes completely silent
Early 2000s
Boeing GRASP program; Li obtains top secret clearance
2007
AAWSAP program begins at DIA ($22M budget)
2008–10
38 DIRDs produced on exotic propulsion, antigravity, warp drives
2012
Harold White reduces Alcubierre drive energy requirement
2014
Ning Li struck by vehicle on UAH campus — permanent brain damage
2015
Li's husband dies; Pais begins filing “UFO patents”
2016
DeLonge emails Podesta about McCasland (WikiLeaks): “He was in charge of that exact laboratory”
2016–19
Navy spends $500K+ testing Pais Effect; concludes it cannot be proven
2018
Eskridge presents antigravity history at Huntsville Alabama L5 Society; Pais patent granted after CTO intervention
2020
Eskridge: “We discovered antigravity, and our lives went to shit”
Apr 2021
Mark McCandlish found dead — ruled suicide by shotgun. Friends say he was about to testify before the Senate
Jul 2021
Ning Li dies at age 78 after years of Alzheimer's following the 2014 accident
2021
Harold White discovers nano-scale warp bubble (published in European Physical Journal)
Jun 2022
Amy Eskridge found dead at age 34 — ruled suicide. DIA releases 37 DIRDs via FOIA
2023
Pais patent expires; Grusch testifies before Congress about crash retrieval programs
Mar 2024
AARO finds “no verifiable evidence” of reverse-engineering programs
Feb 20, 2026
Trump issues UAP disclosure executive order
Feb 27, 2026
McCasland disappears from Albuquerque — 7 days after the disclosure order
Apr 2026
FBI announces investigation into missing/dead scientists; Congress demands briefings
May 2026
Casimir startup launches with $12M for quantum energy chip; Pentagon releases 162 declassified UFO files
The Core Tension: The antigravity conspiracy theory rests on a genuine historical anomaly — a well-documented, industry-wide research effort in the 1950s that vanished overnight with no public explanation. Whether that disappearance reflects successful classification of a breakthrough or the quiet abandonment of a dead end remains the central unresolved question of this entire field.
The Huntsville nexus — where Ning Li, Amy Eskridge, Richard Eskridge, NASA Marshall, Redstone Arsenal, and the University of Alabama all converge — adds geographic concentration to this anomaly. Two antigravity researchers in the same small city, both connected to the same university and space center, both dying within a year of each other under circumstances that have drawn congressional scrutiny, represents either a meaningful pattern or a tragic coincidence.
McCasland's disappearance, seven days after a presidential disclosure order, from a man whose entire career was spent inside the most classified programs in the Air Force, adds another layer that no assessment can easily dismiss.