Australia Scientists: Stinging Trees Contain 'Scorpion-like Venom'

Burnt tree logs are seen in the fire-grounds near Batemans Bay, Australia January 8, 2020. REUTERS/Alkis Konstantinidis
Burnt tree logs are seen in the fire-grounds near Batemans Bay, Australia January 8, 2020. REUTERS/Alkis Konstantinidis
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Australia Scientists: Stinging Trees Contain 'Scorpion-like Venom'

Burnt tree logs are seen in the fire-grounds near Batemans Bay, Australia January 8, 2020. REUTERS/Alkis Konstantinidis
Burnt tree logs are seen in the fire-grounds near Batemans Bay, Australia January 8, 2020. REUTERS/Alkis Konstantinidis

Australia is notorious for its venomous spiders, snakes and sea creatures, but researchers have now identified "scorpion-like" toxins secreted by a tree that can cause excruciating pain for weeks.

Split-second contact with the dendrocnide tree, a rainforest nettle known by its indigenous name gympie-gympie, delivers a sting far more potent than similar plants found in the US or Europe.

The tree, which has broad oval- or heart-shaped leaves, is primarily found in rainforest areas of northeast Queensland, where it is notorious among hikers.

A team of Australian scientists say they now better understand why the gympie-gympie's sting haunts those unlucky enough to brush up against its leaves.

Victims report an initial sting that "feels like fire at first, then subsides over hours to a pain reminiscent of having the affected body part caught in a slammed car door", the University of Queensland researchers said Thursday.

In the final, drawn-out stages, simply taking a shower can reignite the pain, AFP reported.

Though the gympie-gympie is covered in fine needle-like hairs similar to other nettles, previous testing for common irritants such as histamines came up empty.

Irina Vetter, an associate professor at the University of Queensland's Institute for Molecular Bioscience, said the research team discovered a new class of neurotoxin miniproteins, which they christened 'gympietides'.

"Although they come from a plant, the gympietides are similar to spider and cone snail toxins in the way they fold into their 3D molecular structures and target the same pain receptors -- this arguably makes the gympie-gympie tree a truly 'venomous' plant," she said.

Australia is already infamous for its venomous fauna including snakes, box jellyfish, blue-ringed octopus and funnel-web spiders, although deaths in humans from bites or stings are rare.

Vetter said the long-lasting pain inflicted by the tree may be explained by the gympietides permanently altering the chemical makeup of the affected sensory neurons -- not due to the fine hairs getting stuck in the skin.

The scientists hope their research, published in peer-reviewed journal Sciences Advances, will eventually help lead to better pain relief treatment for people who have been stung.



Diriyah Company Sets Guinness World Record for Largest Construction Safety Lesson

Diriyah Company Sets Guinness World Record for Largest Construction Safety Lesson
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Diriyah Company Sets Guinness World Record for Largest Construction Safety Lesson

Diriyah Company Sets Guinness World Record for Largest Construction Safety Lesson

Saudi Arabia’s Diriyah Company has set a new Guinness World Record for the largest construction safety lesson, with the participation of 2,864 workers in Diriyah's Wadi Safar development. The record was achieved in collaboration with Al-Rashid Trading & Contracting Company (RTCC).

In a statement, Diriyah Company said the World Record certification ceremony was held at its head office on Monday.

The 30-minute safety lesson, conducted by a single safety instructor, focused on the "Top Five Critical Safety Hazards in the Construction Industry." The lesson highlighted the importance of safe working practices and personal responsibility by touching on key health and safety measures directly relevant to their daily tasks on-site and is part of a broader commitment to safety training.

Ongoing assessments will be conducted on-site, and additional training will be provided by Diriyah Company's Occupational Health, Safety, & Security program.

To accommodate the scale of the exercise, a dedicated outdoor venue with a specially designed stage was constructed, creating an environment conducive to learning while supporting the official record attempt. A structured entry and exit system using special gates was implemented to measure participation and uphold the integrity of the record attempt. This method provided a precise number of attendees, ensuring compliance with the record requirements.

Through this initiative, Diriyah Company not only set a new benchmark in construction safety training but also reinforced its solid commitment to workers' well-being.

Group CEO of Diriyah Company Jerry Inzerillo said: "This new world record, in which Diriyah's project staff gathered in Wadi Safar, one of Diriyah Company's masterplans covering an area of over 62 sq km, demonstrates our unwavering commitment to safety and our goal of ensuring everyone returns home safely to their families."

"Our health and safety management system goes above and beyond to ensure and protect the welfare of employees, contractors, and on-site teams working across the Diriyah project," he added.

Diriyah Company upholds the highest safety standards across its construction and development sites, reinforced by regular training sessions for both internal teams and external contractors.

To date, Diriyah Company has achieved a Total Recordable Incident Rate (TRIR) of 0.015 for ongoing infrastructure projects.

Wadi Safar, one of Diriyah Company's masterplans, is an exclusive sanctuary of refinement and well-being built from a rich cultural heritage. It features a range of exclusive residential options and internationally renowned hospitality, retail, and leisure venues.

In July 2024, a $2.13 billion joint venture construction contract was awarded for the development of the Royal Equestrian & Polo Club, Wadi Safar, and world-class hotels Aman Wadi Safar, Six Senses Wadi Safar, The Chedi Wadi Safar, and the Faena Wadi Safar.

Wadi Safar is also the location for the prestigious Royal Golf Club, Wadi Safar, and the 27-hole signature championship golf course designed by golf legend Greg Norman.