Çağan Şekercioğlu was an ambitious, but perhaps naive graduate student when, 26 years ago, he embarked on a simple data-compilation project that would soon evolve into a massive career-defining ...

Social birds across the world have mastered the art of living in colonies. They show that survival is often best achieved together. Here are six such bird species.

Learn the key difference between endangered and extinct species, and why it matters for conservation and biodiversity.