Scientific Curiosities: Snake Immunity, Animal Intelligence, and Exercise as Cancer Prevention

Broadcast from KSQD, Santa Cruz on 8-14-2025:

• Dr. Dawn shares the story of Tim Fried, a construction worker who deliberately exposed himself to 850 snake venom doses over 18 years to build immunity. An immunologist developed antivenom from Fried's antibodies that neutralizes venom from 19 deadly snake species, potentially saving thousands of lives annually from snakebite deaths.
• She describes cuttlefish sign language research revealing four specific arm movements. The cuttlefish respond to videos and water vibrations from these signs, suggesting complex communication abilities rather than simple mimicry, potentially comparable to octopus intelligence.
• New research challenges the assumption that Neanderthals were hyper-carnivores. While bone nitrogen levels suggested a meat-only diet, dental evidence showed plant consumption. Researchers now theorize Neanderthals ate maggots from rotting meat, which contain 43% more nitrogen than flesh and would explain the contradictory evidence between bone chemistry and tooth wear patterns.
• CPR guidelines may soon from the traditional ABC approach (airway, breathing, circulation) to focusing immediately on chest compressions. Research on 45 collapsed athletes showed that 27 who received inappropriate airway clearing died or remained comatose, while three who received immediate rapid chest compressions survived with potential for rehabilitation. The recommendationcould become 100-120 compressions per minute without preliminary airway management.
• Dr. Dawn presents reassuring statistics about spinal abnormalities in pain-free adults over 60. MRI studies show 90% have disc degeneration, 80% have disc bulges, and 40% have protrusions - yet these individuals have no back pain. This raises questions about attributing back pain to imaging findings when so many similar abnormalities exist in asymptomatic people.
• Australian cockatoos have learned to operate drinking fountains for entertainment rather than necessity. Researchers observed 70 birds attempting and 40 successfully using fountains, waiting in organized lines and taking turns, despite easier water sources being available nearby.
• An emailer asks about Essiac tea for cancer prevention. Dr. Dawn explains this herbal blend of burdock root, Indian rhubarb, sheep sorrel, and slippery elm shows promise in laboratory studies but lacks quality human research. While not harmful, no studies demonstrate reduced cancer recurrence rates, though the antioxidant properties may provide general health benefits.
• Another emailer inquires about lithium supplements for Alzheimer's prevention. Dr. Dawn discusses research showing lower brain lithium levels in Alzheimer's patients and how amyloid plaques trap lithium. Studies suggest lithium orotate (unlike lithium carbonate) isn't absorbed by plaques and may help memory in mice. Low-dose lithium orotate appears safe and mildly calming for humans.
• Groundbreaking research shows exercise dramatically improves colon cancer survival. A study of 900 patients found the exercise group had 80% five-year disease-free survival versus 74% in controls, with 40% reduced death risk. The intensive program required 10 METs weekly exercise with behavioral support sessions over three years.
• Dr. Dawn explores coffee's health benefits, noting humanity consumes 2 billion cups daily. Multiple studies show moderate consumption (3-4 cups) reduces breast cancer risk in postmenopausal women and slows Parkinson's progression. Compounds like cafestol and chlorogenic acids provide anti-inflammatory and antioxidant effects, though benefits disappear when adding significant cream or sugar.
• She warns about Chikungunya outbreaks in China affecting over 8,000 people. This mosquito-borne illness causes severe bone pain and can spread through blood transfusion. With increased global travel and climate change expanding mosquito ranges, Dr. Dawn emphasizes the importance of volunteering travel history to healthcare providers when presenting with fever and body aches.