Thermogenesis means how living things make their own body heat. It’s not just birds and mammals—plants do it too. Inside their cells, little power plants called mitochondria turn food into energy. But most energy escapes as heat. Sometimes plants can use this heat in clever ways. The sacred lotus grows in ponds in North and Central India. Its flowers bloom in early summer when nights can be cold. The flower’s inside temperature stays 30-35º C, much warmer than the 10º C outside. When the lotus flower’s petals turn pink, thermogenesis starts. The flower warms up and spreads a strong scent. The lotus has a central cone with female parts first ready to be pollinated. The scent attracts bees and beetles. The flower then closes, making a warm shelter for the insects at night. The next morning, male parts release pollen on the insects. They carry it to other flowers, helping cross-pollination. This helps the plant’s babies grow stronger. Heat is controlled by calcium inside the plant cells. When it’s time to warm up, calcium levels rise and trigger mitochondria to work harder. This uses up stored starch and fat. Other plants like the Eastern skunk cabbage in North America also use heat. It melts snow so the flower can bloom early. Beetles get warm in these flowers. The dead horse arum lily in Sardinia uses heat to spread a strong, unpleasant smell to attract blowflies, which help pollination. These plants show how nature uses heat in fascinating ways to survive and reproduce.