Reddit science
1A Drug Commonly Used to Treat Erectile Dysfunction, May Also Help Regenerate Damaged Muscle. Research Suggests the Medication, Tadalafil Could Support Muscle Repair and Recovery by Influencing Biological Processes Involved in Muscle Regeneration in Mouse Models.
- Researchers at the University of Rome Foro Italico found that tadalafil, a drug used for erectile dysfunction, boosted muscle precursor cell growth and survival in lab mice cells and helped them heal faster. It may one day help people with muscle-wasting diseases, but it could also be misused in sports.
Gym use for performance
Commenters say many lifters already take tadalafil, often 5mg daily, for vascularity, pumps, and endurance, and some call it a longtime gym staple that may have inspired the research.Side effects
Users report prolonged morning erections, nasal congestion, headaches at higher doses, and indigestion. Eye risks like NAION and glaucoma come up, but replies stress they are extremely rare.Broader health benefits
Commenters cite links to lower dementia, stroke, and heart attack risk. Replies caution that the dementia data are retrospective and may reflect healthier users rather than the drug's effect.
2A survey of 15,000 people across 81 countries found that bottled water consumption persists despite awareness of microplastics. Convenience, marketing and concerns about access to safe drinking water influence consumption habits, suggesting that awareness alone is insufficient to change behavior.
Unsafe tap water drives bottled use
Many buy bottled water because local tap water tastes bad, contains lead, PFAS or nitrates, or is unsafe. Costly filters and landlords who forbid installing them limit alternatives.Regulation and access could shift habits
Commenters point to deposit-return schemes in the Netherlands, Germany and Norway, and to free public drinking water. Others note such rules would not help where tap water is undrinkable.Microplastic harms remain uncertain
Several argue the health risks are unproven and unquantified, so there is little reason to change habits. Others say avoiding plastic is futile when it is also in food and packaging.
3Humans experienced abrupt environmental changes at White Sands during the Last Glacial Maximum
Climate change parallels
Commenters say comparing this ancient period to modern climate change is misguided, since these were nomadic hunter-gatherers. Replies argue modern agriculture, infrastructure, and dense populations make today's changes far more disruptive.Reliability of trackway dating
Users say the dating is getting harder to deny, citing consistent radiocarbon data with no reversals. A non-specialist asked for clarification of what this meant.Praise for the study
A commenter calls the study cool and interesting for tying the footprint trackways to environmental data.