THREAD: My Top 12 Favourite Perceptual Illusions

1. A great example of how expectations guide perception.

2. The horizontal lines in this image are all parallel. https://t.co/Y0o0hd8R15 HT @victoria1skye
3. The circles in this image are all the same colour. https://t.co/H4Prys8l0n
4. This isn't a GIF – the movement is all in your head.
5. This looks two photos of the same road, taken from different angles. But it’s just the same photo twice. https://t.co/pdq0iRynFw
6. We don't directly perceive how light or dark objects are; the perceptual system makes an educated "guess" based on the lightness or darkness of the surroundings. https://t.co/C8VwDBJbYx HT @AkiyoshiKitaoka
7. The Dynamic Ebbinghaus: The orange circle doesn't change size. https://t.co/wReYo1466M
8. The Dynamic Müller-Lyer Illusion: The vertical black, green, and blue lines don't change size. https://t.co/bDyeOKXgbC
9. You can make the train change direction. https://t.co/n8AzuhJx26
10. Rotating Rings: Every time you switch from looking at one wheel to looking at the other, they both change direction. https://t.co/IdAQGgXsJi
11. The Spinning Dancer https://t.co/3GAwtsnVAL

If you look at the dancer on the left and the one in the middle, the one in the middle spins clockwise.

If you look at the dancer on the *right* and the one in the middle, the one in the middle spins counterclockwise.
12. Stare at the centre of the top image for 20 seconds then look at the bottom image...

More from All

https://t.co/6cRR2B3jBE
Viruses and other pathogens are often studied as stand-alone entities, despite that, in nature, they mostly live in multispecies associations called biofilms—both externally and within the host.

https://t.co/FBfXhUrH5d


Microorganisms in biofilms are enclosed by an extracellular matrix that confers protection and improves survival. Previous studies have shown that viruses can secondarily colonize preexisting biofilms, and viral biofilms have also been described.


...we raise the perspective that CoVs can persistently infect bats due to their association with biofilm structures. This phenomenon potentially provides an optimal environment for nonpathogenic & well-adapted viruses to interact with the host, as well as for viral recombination.


Biofilms can also enhance virion viability in extracellular environments, such as on fomites and in aquatic sediments, allowing viral persistence and dissemination.
॥ॐ॥
अस्य श्री गायत्री ध्यान श्लोक:
(gAyatri dhyAna shlOka)
• This shloka to meditate personified form of वेदमाता गायत्री was given by Bhagwaan Brahma to Sage yAgnavalkya (याज्ञवल्क्य).

• 14th shloka of गायत्री कवचम् which is taken from वशिष्ठ संहिता, goes as follows..


• मुक्ता-विद्रुम-हेम-नील धवलच्छायैर्मुखस्त्रीक्षणै:।
muktA vidruma hEma nIla dhavalachhAyaiH mukhaistrlkShaNaiH.

• युक्तामिन्दुकला-निबद्धमुकुटां तत्वार्थवर्णात्मिकाम्॥
yuktAmindukalA nibaddha makutAm tatvArtha varNAtmikam.

• गायत्रीं वरदाभयाङ्कुश कशां शुभ्रं कपालं गदाम्।
gAyatrIm vardAbhayANkusha kashAm shubhram kapAlam gadAm.

• शंखं चक्रमथारविन्दयुगलं हस्तैर्वहन्ती भजै॥
shankham chakramathArvinda yugalam hastairvahantIm bhajE.

This shloka describes the form of वेदमाता गायत्री.

• It says, "She has five faces which shine with the colours of a Pearl 'मुक्ता', Coral 'विद्रुम', Gold 'हेम्', Sapphire 'नील्', & a Diamond 'धवलम्'.

• These five faces are symbolic of the five primordial elements called पञ्चमहाभूत:' which makes up the entire existence.

• These are the elements of SPACE, FIRE, WIND, EARTH & WATER.

• All these five faces shine with three eyes 'त्रिक्षणै:'.

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