Twining motion of growing vines: Climbing vines require structural support during their growth. The swinging shoot tip is believed to help the plant locate a suitable support. Upon contact, the plant undergoes directional growth and the vine begins to curl around the support. This process is called thigmotropism. Source: Colin Sullender #science #biology #botany #plants #GIF

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Melting steel with sunlight In this demonstration, an array of mirrors is used to focus sunlight onto a steel plate. After warming up for a few seconds, the steel reaches its melting point of around 2500°F (1,370°C) and begins to drip down. Source: James May's Big Ideas #science #engineering #SolarPower #GIF

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