Yes. Extracting zinc is highly complex because it vaporizes at low temperatures. Ancient Indians at Zawar (Rajasthan) mastered the distillation process in the 12th century, a technology Europe didn't figure out until centuries later.

Dating back to 2400 BCE in the Indus-Saraswati civilization, Lothal features the world's earliest known engineered tidal dockyard. It proves ancient Indians possessed advanced knowledge of oceanography, hydrography, and maritime engineering.

While the Puranas use the allegory of Rahu and Ketu swallowing the sun, astronomers like Aryabhata (5th century) explicitly wrote that eclipses are caused by the shadows cast by the Earth and the Moon, entirely divorcing the phenomenon from superstition.

Many temples, like the Vittala Temple in Hampi, have 'musical pillars' that resonate at specific musical notes when struck. The architecture was designed to amplify the acoustic resonance of Sanskrit chanting, acting as massive sound-chambers.

Before British colonization destroyed the local industry, Indian ships (made of teak) were considered the sturdiest in the world. They used unique 'stitched' hull designs that could absorb the shock of ocean waves better than European nailed ships.

A marvel of water architecture, like Chand Baori in Rajasthan. These are inverted pyramids going stories deep into the earth. They acted as advanced rainwater harvesting systems, natural air-conditioners, and community hubs in dry climates.

Sushruta's ancient medical texts describe the use of specific wine formulations and cannabis fumes to induce insensibility to pain before complex surgical procedures, acting as an early form of anesthesia.

Built by the Chola King Karikalan in the 2nd century CE on the Kaveri River, it is the oldest water-diversion or water-regulator structure in the world that is still in use today, proving the longevity of ancient Indian civil engineering.

The Sanskrit word for geography is 'Bhugol' (Bhu = Earth, Gol = Sphere). The Varaha Avatar of Vishnu is famously depicted lifting a spherical Earth, proving the civilization knew the Earth was round thousands of years before Magellan.

Known as 'Ghatika Yantra', these were sinking bowl mechanisms used to measure time with extreme precision. They were crucial for establishing exact astrological and astronomical timings for rituals and scientific observation.