Could Earth have hosted an advanced civilization before humans? This intriguing question is at the heart of the Silurian Hypothesis, a theory that challenges our understanding of Earth’s history. By ...

Kissing is not universal today and only 46% of cultures practice it, say researchers THURSDAY, Nov. 20, 2025 (HealthDay News) — Kissing may feel like a very human habit, but new research suggests it ...

The act of kissing may have started long before modern humans existed, a new modeling study suggests. Kissing stretches back roughly 21 million years, to the shared ancestor of humans and other large ...

THURSDAY, Nov. 20, 2025 (HealthDay News) — Kissing may feel like a very human habit, but new research suggests it has much deeper roots. A team of scientists says the behavior likely began more than ...

Kissing may date back 21.5 million years in early ape ancestors Researchers studied modern primates to estimate how the behavior evolved Kissing is not universal today and only 46% of cultures ...