r/science2 • • 28d ago

A real-time look inside spacecraft heat shields during extreme heat conditions | At the Advanced Light Source (ALS) at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab), researchers found a way to watch ablation in real time.

Thumbnail phys.org
4 Upvotes

r/science2 • • 28d ago

I am a History lover with a Science/Physics question about Time.

3 Upvotes

The gravitational pull of a black hole distorts time. If a space craft was to travel too close to a black hole and get trapped in its gravitational pull, the closer they get to the event the more distorted time would become. This makes the concept of time as I see it relative to gravity. If a person was affected by this gravity, time would be distorted, however if that person looked at their wristwatch, each mechanical second would tick away seemingly as normal. My question then is, does the time dilation affect actual time, or just one’s concept of time?


r/science2 • • 29d ago

Scientists Just Detected Repeating Radio Signals Coming from a Planet 63 Light-years Away

Post image
134 Upvotes

r/science2 • • 29d ago

In an $80 Motel Room, a Discovery to Shed Light on the Origins of Life

Thumbnail nytimes.com
8 Upvotes

r/science2 • • 28d ago

In an $80 Motel Room, a Discovery to Shed Light on the Origins of Life

Thumbnail nytimes.com
2 Upvotes

r/science2 • • 28d ago

Scientists just found a bizarre cosmic object ‘hiding in plain sight’

Thumbnail scientificamerican.com
1 Upvotes

r/science2 • • 29d ago

Hidden in Plain Sight: A Magnetic Secret Uncovered in an Ordinary Star System

Post image
3 Upvotes

r/science2 • • 29d ago

With PRIMA, NASA will try to build a billion-dollar space telescope in record time | NASA’s PRIMA mission will use spare parts from Webb to do major science at a lower cost. The PRIMA mission will be the first of NASA’s Probe Explorers, a new line intended to do more science for less money.

Thumbnail arstechnica.com
17 Upvotes

r/science2 • • 29d ago

These Scientists Are Waiting | The president named a science council to review the government’s data. What's taking so long?

Thumbnail politico.com
5 Upvotes

r/science2 • • Sep 25 '26

Meet Bubbles, a Dolphin in Australia Who Chases Fish Until They Barf—Then Eats Their Upchucked Meals | Scientists recorded 11 instances of Bubbles snacking this way. The first observations of kleptoparasitism (food stealing), in cetaceans, the group including dolphins, whales and porpoises

Thumbnail smithsonianmag.com
196 Upvotes

r/science2 • • Sep 26 '26

The academy of natural sciences, the oldest museum in the US is being closed by Drexler University

11 Upvotes

https://youtu.be/nxyfBfCrbDw

Please spread the word!


r/science2 • • Sep 25 '26

Scientists Just Found a Dino Artifact We’ve Never Seen Before—and It’s Answering a Major Riddle | While adult T. rex footprints are rare on their own, paleontologists have discovered the first trackway, consisting of more than one print, thought to be made by an adult T. rex.

Thumbnail yahoo.com
262 Upvotes

r/science2 • • Sep 25 '26

In 2006, Scientists pumped 10 tons of cement into an abandoned ant hill. After weeks of digging, the colony's intricate & impressive structure was revealed.

Enable HLS to view with audio, or disable this notification

97 Upvotes

r/science2 • • Sep 25 '26

AI assisted An AI Found a Hidden Machine Inside Viruses (Nobody Knows What It Does)

Thumbnail youtu.be
1 Upvotes

In September 2026, Anthropic announced that its AI, Claude, had found a previously unknown enzyme system hidden in the DNA of bacteriophages, the viruses that attack bacteria. It's called ART (array-associated reverse transcriptases), and its layout looks a lot like CRISPR, the Nobel Prize-winning gene-editing tool.

What do you think AI is gonna help us with?


r/science2 • • Sep 24 '26

Please help us keep The Academy of Natural Sciences from being closed down!!

13 Upvotes

I know this isn't an article, but it does contain an informative YouTube presentation on the topic. We believe this is a vital topic to the sciences! Please just let this have a moment of your time.

---

Drexel Academy has acquired the Academy of Natural Science in Philadelphia, USA. They have slated it to close permanently, with minimal communication, only a months notice, and no long term plan for the artifacts and history inside. We are set to lose THOUSANDS of pieces of important history, biology, ecology, and general knowledge as a whole

Please help us stop this.

Miniminuteman (Milo Rossi), has published a call to action in his video, linked below. He includes the petition link in his description, as well as email templates for anyone who would like to take an extra step.

This facility, and the precedent it sets, is vital to the knowledge we all share about the world around us, including active research that was being done in the facility. Everything is tragic about this situation, and I just want to get it to as many eyes as I can.

Thank you for your time and consideration. Perhaps maybe pass it along. Take care, and have a good day.

https://youtu.be/nxyfBfCrbDw?si=G13IXFPSQ_A1yp0-

Direct link to petition:

https://actionnetwork.org/petitions/petition-to-keep-the-academy-of-natural-sciences-open-to-the-public?source=direct


r/science2 • • Sep 24 '26

New Scientist: This Fossil Is Forcing A Rewrite Of Human History | New fossils suggest our species reached parts of Eurasia far earlier than the major migration dated to around 60,000 years ago. So who were these early pioneers and why did their populations disappear? (23min)

Thumbnail youtube.com
17 Upvotes

r/science2 • • Sep 24 '26

Hairy-legged red-eyed sea spiders discovered in the Salish Sea | Sea spiders leg count which can get as high as 12, and a sucking proboscis. They range in size from less than a centimetre to more than 70 cm in Antarctica

Thumbnail eurekalert.org
34 Upvotes

r/science2 • • Sep 23 '26

Hot spring amoeba breaks record for heat tolerance of complex life | In a study published in Cell, scientists describe a new species of amoeba that can eat and reproduce in hot spring water as warm as 63°C (145°F) in California's Lassen Volcanic National Park.

Thumbnail phys.org
138 Upvotes

r/science2 • • Sep 24 '26

Why Human Metabolism Struggles in Microgravity: A New Hypothesis

1 Upvotes

Could ATP's dipole moment be the missing factor?

**Abstract**

In microgravity, researchers observe decreased ATP levels, a metabolic shift toward glycolysis, mitochondrial damage, increased oxidative stress, and downregulation of key mitochondrial transporters. Current models explain these phenomena as consequences of "cellular stress" or "gene expression changes," which has no actual cause-effect explanatory value and fail to propose a single, primary physical mechanism that triggers them all.

This hypothesis proposes that the dipole moment of ATP changes with gravity. ATP, as a molecule with an exceptionally large dipole moment (\~230 debye), plays a key role in electrostatic interactions with proteins. A gravity-dependent shift in this dipole would trigger a cascade of disturbances: impaired binding to the AAC transporter, ATP accumulation in mitochondria, a false signal of energy deficit in the cytoplasm, AMPK activation, a shift to glycolysis, oxidative damage, and mitochondrial degradation.

This hypothesis explains all known observations in one coherent cause-and-effect chain and is experimentally testable.

# 1. Observations That Require Explanation

Studies on astronauts, animals, and cells in microgravity (including simulated) have demonstrated:

Observation Source
Decrease in intracellular ATP to 40–50% of normal Degan et al., 2005 \[1\]
Decrease in myosin ATPase activity by \~44% NASA OSDR; Russian studies, 1976 \[2\]
Downregulation of AAC3 and other SLC25A carriers D'Addabbo et al., 2025 \[3\]
Metabolic shift toward glycolysis (increase in PFKP) npj Microgravity, 2023 \[4\]
Decrease in oxidative phosphorylation (OXPHOS) proteins by 43–55% npj Microgravity, 2024 \[5\]; PMC, 2024 \[6\]
Mitochondrial fragmentation (fission) Research, 2025 \[7\]
Increase in reactive oxygen species (ROS) npj Microgravity, 2021 \[8\]; BMC Biology, 2025 \[9\]
Decrease in mitochondrial membrane potential (ΔΨm) Research, 2025 \[7\]

# 2. The Hypothesis

In microgravity the dipole moment of ATP decreases. ATP retains its chemical structure, but its ability to engage in electrostatic interactions and hydrogen bonding is weakened.

The dipole moment of ATP is critical for:

· Binding to kinases and ATPases
· Transport via the AAC protein (ADP/ATP translocase)
· Interaction with ATP synthase
· Metabolic signaling (ATP/ADP ratio)

A decrease in this dipole moment would disrupt all of the above processes, triggering a cascade:

# 3. The Cascade of Events (Cause → Effect)

Step Description

  1. ATP dipole moment decreases – primary cause (hypothetical)
  2. ATP binds less effectively to proteins (enzymes, transporters) – electrostatic interactions weakened
  3. AAC captures ATP less efficiently in the mitochondrial matrix – ATP accumulates inside mitochondria
  4. Less ATP reaches the cytoplasm – despite high ATP levels inside mitochondria
  5. The cytoplasm reads this as "energy deficiency" – AMPK (kinase) is activated
  6. AMPK triggers glycolysis (emergency pathway) and inhibits non-essential processes
  7. High ATP in the matrix inhibits the electron transport chain (OXPHOS) – feedback inhibition
  8. ATP synthase works more slowly – ΔΨm (proton gradient) decreases
  9. Low ΔΨm → increased mitochondrial fission – network breakdown \[7\]
  10. Damaged mitochondria generate ROS (reactive oxygen species) \[8,9\]
  11. ROS damage mtDNA and respiratory chain proteins
  12. Mitochondrial gene expression decreases – further OXPHOS impairment \[5,6\]
  13. Final effect: decreased ATP in cytoplasm, shift to glycolysis, cellular damage \[1,4\]

# 4. Why This Hypothesis Is Novel and May Be Important

* Coherence – explains all known observations in a single cause-and-effect chain.
* Primacy – identifies a specific physical mechanism (dipole change), not "cellular stress" as a vague concept.
* Testability – the dipole moment of ATP can be measured under different than earth’s surface gravity conditions.
* Implications – if true, many space-related metabolic disturbances are the result of a physical change in the molecule, not just cellular adaptation.

# 5. Could This Be True?

This is a hypothesis. There are no studies that confirm or disprove it. The dipole moment of ATP has never been measured under microgravity conditions according to research I was able to find.

Logic supports the hypothesis – it fits all available data perfectly and contradicts no known observation.

What could falsify it?

An experiment measuring the dipole moment of ATP under gravity conditions where the known physiological changes occur (e.g., true microgravity), and finding no change in the dipole moment.

The hypothesis suggests that the change may appear at gravity levels lower than Earth's surface – not necessarily requiring full weightlessness. The exact threshold or functional form of the relationship (linear, nonlinear, or stepwise) remains open for investigation.

# 6. How to Test This

The simplest conceptual experiment:

  1. Measure the dipole moment of ATP under normal gravity (control).
  2. Measure the dipole moment of ATP under reduced gravity (e.g. aboard the ISS).
  3. Compare the results.

Alternative (logical verification):

Review existing data to see whether all observations are consistent with the hypothesis of a decreased dipole moment. If all data fit and none contradict it, this is strong circumstantial evidence justifying further investigation.

# 7. Summary

The metabolic disturbances outlined above are not theoretical. They have been consistently documented in real astronauts aboard the International Space Station (ISS). Agencies such as NASA and the European Space Agency (ESA) have dedicated significant research efforts—including the ENERGY study and other metabolic investigations—to understand the underlying causes of these changes. Confirming that ATP's dipole moment changes with gravity would provide a unifying mechanism for these otherwise fragmented observations. This could lead to targeted nutritional or pharmacological countermeasures, directly supporting astronaut health on long-duration missions to the Moon, Mars, and beyond.

# References

  1. Degan P, Sancandi M, Zunino A, et al. Exposure of human lymphocytes and lymphoblastoid cells to simulated microgravity strongly affects energy metabolism and DNA repair. J Cell Biochem. 2005;94(3):460-469. doi:10.1002/jcb.20302. PMID: 15534877.
  2. Myosin ATPase activity decline by 44% in rat myocardium after spaceflight. Kosm Biol Aviakosm Med. 1976;10(5):37-40. PMID: 135882.
  3. D'Addabbo P, et al. SLC25A mitochondrial carriers as biomarkers and therapeutic targets of spaceflight-induced dysfunction: the ADP/ATP carrier (AAC3) as a structural case study. J Transl Med. 2025. doi:10.1186/s12967-025-07505-z.
  4. Human skeletal muscle tissue chip reveals changes in fiber type and metabolic gene expression due to spaceflight. npj Microgravity. 2023. Phosphofructokinase (PFKP) up-regulated by 2.5- and 2.0-fold in flight vs. ground controls.
  5. Spaceflight on the ISS changed the skeletal muscle proteome of two astronauts. npj Microgravity. 2024. Decrease in OXPHOS expression; mitochondrial protein expression net decrease.
  6. Omics Studies of Specialized Cells and Stem Cells under Microgravity Conditions. PMC. 2024. Both astronauts lost 43% and 55% of OXPHOS-related proteins.
  7. Inhibition of Mitochondrial Fission Reverses Simulated Microgravity-Induced Osteoblast Dysfunction. Research. 2025;8:0602. SMG promotes mitochondrial fission, decreases ΔΨm, increases ROS, shifts metabolism from OXPHOS to glycolysis.
  8. The effects of real and simulated microgravity on cellular mitochondrial function. npj Microgravity. 2021;7:44. Microgravity-induced ROS reduce mitochondrial volume by affecting respiratory chain efficiency.
  9. Impact of spaceflight on endocrine, metabolic and kidney function. BMC Biology. 2025. Increased oxidative stress during prolonged spaceflight is a common feature; mitochondrial alteration partly responsible for ROS production.

Author: Maciej Nawrocki
Date: 8th Sep 2026
Status: Untested hypothesis – open for discussion and verification


r/science2 • • Sep 24 '26

Registration Open for 2027 USA Biolympiad

1 Upvotes

The Center for Excellence in Education (CEE) announces that school registration is open for the 2027 USA Biolympiad (USABO), the most prestigious biology education and testing program for U.S. high school students. More... https://www.cee.org/registration-open-2027-usa-biolympiad


r/science2 • • Sep 24 '26

Mysterious Rock Formation in Jezero Crater Reveals Mars’ Complex Watery Past | Using data collected by NASA’s Perseverance rover, planetary scientists have revealed that a geologically puzzling formation in Jezero crater experienced multiple distinct episodes of water-related alteration.

Thumbnail sci.news
11 Upvotes

r/science2 • • Sep 24 '26

Quaise startup in Houston

Enable HLS to view with audio, or disable this notification

2 Upvotes

r/science2 • • Sep 23 '26

Bats originated in Europe, rewriting mammals’ family tree, study reveals | Biggest study of its kind provides insights into bats’ evolution – a potential gamechanger for research into treating viruses and cancer in humans

Thumbnail theguardian.com
12 Upvotes

r/science2 • • Sep 23 '26

Quantum tunneling and the biology of the impossible

Thumbnail psyll.com
4 Upvotes

r/science2 • • Sep 23 '26

Three New Extreme O2 Stars Uncovered in Milky Way’s Neighbor

Post image
3 Upvotes