Devices like TinyLev let educators explore acoustic levitation. Generating the necessary sound intensity requires care, but the technique illustrates how sound waves exert force and is being explored for manufacturing and pharmaceuticals. Float your way to more knowledge ➡️ w.wiki/FLhd (4/4)

Arrays of transducers can move levitated objects in three dimensions or merge droplets. Demonstrations show styrofoam beads or water droplets floating between a speaker and a reflector. (3/4)

A transducer emits ultrasonic waves toward a reflector, creating nodes where upward pressure balances gravity. This containerless environment is useful for studying materials that would otherwise stick to a container, such as molten metals or protein crystals. (2/4)

On Gurpurab, gurdwaras host hymns, scripture readings, and kirtan. After prayers, worshippers share a meal. Night prayers coincide with Guru Nanak’s birth. The festival emphasizes service, equality, and reflection. Discover this unifying celebration ➡️ w.wiki/9a7o (2/2)

The idea caught on as people sought portable meals. Bread‑and‑filling dishes existed worldwide for centuries, but the name stuck. Countless combinations fit the definition today.

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By blending Indigenous beliefs with Catholic tradition, the ofrenda shows that death is part of life and memory keeps relationships alive.

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Candles, paper cutouts, bread, and water represent fire, air, earth, and water. Regions add flair with alebrijes in Oaxaca, sugar skulls in Michoacán, and special dishes like mole poblano. (3/4)

The altars invite spirits to return and mingle with the living. Usually three tiers high, the top displays saints and ancestors, the middle holds favorite treats, and the bottom features candles, water, and personal items to guide souls. (2/4)

All Saints' Day honors all saints; All Souls' Day is dedicated to praying for departed Christians.

Today, Halloween often eclipses the religious aspect, but the three days together invite reflection on mortality.

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Beginning on 31 October, All Hallows’ Eve is a time to remember martyrs, saints, and the departed. The name combines Old English words for "holy" and "time". It retains customs like wearing masks and visiting graveyards; some believe the boundary between the living and dead is thinner. (2/3)

Because wood usually decays, its preservation in peat is remarkable. Early dating placed it at a few thousand years old; improved methods later revealed its true age.

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The museum won a 2011 award for innovation. It has toured many cities and opened another site in Thailand in 2024. The project underscores heartbreak's universality and the power of objects to tell stories.

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