This Drone Could Pollinate Your Entire Garden

When you hear ‘bees’ and ‘drone’ in the same sentence, you think of the low, continuous hum that the insects omit. What you don’t think is expensive gadget used to film smug family’s Jamaican getaway. Nonetheless, the scientific community’s concerns about the imminent demise of honeybees has instigated the development of drones – of the tangible persuasion – to carry out artificial pollination.

The development comes amidst ongoing concerns about the world’s bee population, and the ramifications if bees die out altogether. Extinction would have huge consequences for the global ecosystem: bee pollination is responsible, in varying capacities, for apples, cucumbers, cauliflower, carrots, celery, broccoli and onions. In turn, it is estimated that bees are responsible for approximately 1.4 billion jobs worldwide; they’re a critical component of human welfare. Pound for pound, they contribute more to the nation’s GDP than the royal family.

In a recent endeavor, scientists in Japan have come up with a backup plan should the world’s honeybee population collapse, in the form of mini hummingbird-sized drones. Protruding from the drone’s body are a cluster of horsehair paintbrush bristles coated in a sticky gel, which facilitates the pick-up and redistribution of pollen grains amongst flowers.

The researchers stressed that “The global pollination crisis is a critical issue for the natural environment and our lives. The need to develop an innovative pollination tool that does not require time and effort to achieve pollination with a high success rate is urgent.”

The drones signal a step forward, certainly, but they lack the honey-producing capacity of the bees themselves. Plus, there’s a long way to go before the drones can operate without human guidance, not to mention a huge financial barrier to overcome. Nonetheless, flawed though they may be, the drones are a necessary evil; it is estimated that about 9% of bees are classified as ‘threatened’, and bee colonies are in sharp decline.

This isn’t the first time that humans have intervened, laden with technology, in an attempt to save the bees; in 2015 Australian scientists installed micro tracking chips on bees in an endeavor to find out the causes of ‘colony collapse’, the phenomenon which depletes the honeybee population.

As unsettling as all this bee-interventionism may be – you may remember a similar scenario going horribly wrong in the final episode of Black Mirror – it’s a solution to a potentially devastating problem. Suffice it to say, there’s plenty of ‘buzz’ (I’m sorry) surrounding the issue…

This Florida Tree is So Toxic, You Can’t Even Stand Under It When It Rains

In 1999, radiologist Nicola Strickland went on a holiday to the Caribbean island of Tobago, a tropical paradise complete with idyllic, deserted beaches. On her first morning there, she went foraging for shells and corals in the white sand, when the holiday quickly took a turn for the worse.

Scattered amongst the coconuts and mangoes on the beach, Strickland and her friend found some sweet-smelling green fruit that looked much like small crabapples. Both foolishly decided to take a bite, and within moments the pleasant, sweet taste was overwhelmed by a peppery, burning feeling and an excruciating tightness in the throat that gradually got so bad they could barely swallow.

The fruit in question belonged to the manchineel tree (Hippomane mancinella), sometimes referred to as ‘beach apple’ or ‘poison guava’. It’s native to the tropical parts of southern North America, as well as Central America, the Caribbean, and parts of northern South America.

The plant bears another name in Spanish, arbol de la muerte, which literally means “tree of death”. According to the Guinness World Records, the manchineel tree is in fact the most dangerous tree in the world. As explained by the Florida Institute of Food and Agricultural Sciences, all parts of manchineel are extremely poisonous, and “interaction with and ingestion of any part of this tree may be lethal”.

Manchineel belongs to the large and diverse Euphorbia genus, which also contains the decorative Christmas poinsettia. The tree produces a thick, milky sap, which oozes out of everything – the bark, the leaves and even the fruit – and can cause severe, burn-like blisters if it comes into contact with the skin.

This sap contains a range of toxins, but it’s thought that the most serious reactions come from phorbol, an organic compound that belongs to the diterpene family of esters. Because phorbol is highly water-soluble, you don’t even want to be standing under a manchineel when it’s raining – the raindrops carrying the diluted sap can still severely burn your skin.

Because of these horrifying properties, in some parts of the tree’s natural range they are painted with a red cross, a red ring of paint, or even paired with explicit warning signs. We could just remove them, but they play a valuable role in the local ecosystems – as a large shrub, the manchineel grows into dense thickets that provide excellent windbreaking and a protection against coastal erosion on Central American beaches.

There have been reports of severe cases of eye inflammation and even temporary blindness causes by the smoke of burning manchineel wood – not to mention the effects of inhaling the stuff. However, Caribbean carpenters have been using manchineel wood in furniture for centuries – after carefully cutting it and drying in the sun to neutralise the poisonous sap.

“The real death threat comes from eating its small round fruit,” Ella Davies writes for the BBC. “Ingesting the fruit can prove fatal when severe vomiting and diarrhoea dehydrate the body to the point of no return.”

Fortunately, Strickland and her friend lived to tell the tale, because they only ate a tiny amount of death apple. In 2000, Strickland published a letter in The British Medical Journal, describing her symptoms in detail.

It took over 8 hours for their pain to slowly subside, as they carefully sipped pina coladas and milk. The toxin went on to drain into the lymph nodes on their necks, providing further agony. “Recounting our experience to the locals elicited frank horror and incredulity, such was the fruit’s poisonous reputation,” Strickland wrote. “We found our experience frightening.”