Octopuses are able to taste their food through the suction-cup-like suckers along their eight tentacles, with new research showing that the molluscs can distinguish between potentially toxic prey and a tasty dinner.
Research published in the journal Cell, suggests that chemicals known as terpenoids – produced by many marine invertebrates in a warning signal – trigger differing responses on the octopuses' receptors and sensory cells in their suckers.
Initially a study into the California two-spot octopus by Nicholas Bellono, a molecular and cellular biologist from Harvard University, and his team found that the animal’s suckers reacted differently when it touched prey compared to something else. The study confirmed the idea that the suckers have a “taste-touch" capacity.
"We also showed that separate and distinct chemo- and mechanosensory cells express specific receptors and exhibit discrete electrical activities to encode chemical and touch information, respectively," Dr Bellono said.
"Our results demonstrate that the peripherally distributed octopus nervous system exhibits exceptional signal filtering properties that are mediated by highly specialised sensory receptors."
The researchers cautioned, however, that many other unknown substances may set off different responses in broadly the same way.
GOLF’S RAHMBO
- 5 wins in 22 months as pro
- Three wins in past 10 starts
- 45 pro starts worldwide: 5 wins, 17 top 5s
- Ranked 551th in world on debut, now No 4 (was No 2 earlier this year)
- 5th player in last 30 years to win 3 European Tour and 2 PGA Tour titles before age 24 (Woods, Garcia, McIlroy, Spieth)
Rajasthan Royals 153-5 (17.5 ov)
Delhi Daredevils 60-4 (6 ov)
Rajasthan won by 10 runs (D/L method)
Spider-Man%202
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WHAT IS A BLACK HOLE?
1. Black holes are objects whose gravity is so strong not even light can escape their pull
2. They can be created when massive stars collapse under their own weight
3. Large black holes can also be formed when smaller ones collide and merge
4. The biggest black holes lurk at the centre of many galaxies, including our own
5. Astronomers believe that when the universe was very young, black holes affected how galaxies formed
MORE ON IRAN'S PROXY WARS
If you go…
Emirates launched a new daily service to Mexico City this week, flying via Barcelona from Dh3,995.
Emirati citizens are among 67 nationalities who do not require a visa to Mexico. Entry is granted on arrival for stays of up to 180 days.
TERMINAL HIGH ALTITUDE AREA DEFENCE (THAAD)
What is THAAD?
It is considered to be the US's most superior missile defence system.
Production:
It was created in 2008.
Speed:
THAAD missiles can travel at over Mach 8, so fast that it is hypersonic.
Abilities:
THAAD is designed to take out ballistic missiles as they are on their downward trajectory towards their target, otherwise known as the "terminal phase".
Purpose:
To protect high-value strategic sites, such as airfields or population centres.
Range:
THAAD can target projectiles inside and outside the Earth's atmosphere, at an altitude of 150 kilometres above the Earth's surface.
Creators:
Lockheed Martin was originally granted the contract to develop the system in 1992. Defence company Raytheon sub-contracts to develop other major parts of the system, such as ground-based radar.
UAE and THAAD:
In 2011, the UAE became the first country outside of the US to buy two THAAD missile defence systems. It then stationed them in 2016, becoming the first Gulf country to do so.
Wicked
Director: Jon M Chu
Stars: Cynthia Erivo, Ariana Grande, Jonathan Bailey
MOUNTAINHEAD REVIEW
Starring: Ramy Youssef, Steve Carell, Jason Schwartzman
Director: Jesse Armstrong
Rating: 3.5/5
THE SPECS
Engine: 1.5-litre, four-cylinder turbo
Transmission: seven-speed dual clutch automatic
Power: 169bhp
Torque: 250Nm
Price: Dh54,500
On sale: now
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