Readers discuss a guest essay about birthrates and the world’s population. Also: A citizens’ celebration for America’s 250th ...

To obtain comprehensive and accurate data, it is necessary to conduct field surveys of ground substrate, arable land, soil quality, and other natural resource classes. This is in difficult and key ...

Humans can remember various types of information, including facts, dates, events and even intricate narratives. Understanding ...

A new genomic study reveals how human populations adapted, survived, and diversified in the Himalayas, one of the most ...

Cancer does not develop overnight. It can take decades for cancer‐promoting changes in the genome to eventually lead to the ...

The world's population is expected to peak at 10.3 billion in 2084 and then decline to 10.2 billion through the end of the ...