100 Unanswered Questions About Ourselves, Our World and Our Universe

Hotter than a crocodile, cooler than a chicken, T. Rex was definitely warm-blooded, according to a new study.

A lone signal from an experiment in South Dakota doesn’t fit the profile of any other known particles, physicists say.

Given access to email, A.I. agents have started reaching out to the philosophers and researchers exploring deep questions about them.

The human microbiome is essential to our health, but scientists still know very little about it. Two researchers set out to map this largely uncharted terrain.

A Nobel laureate’s decades-long commitment to open science is reshaping biotechnology in the AI era.

Michael Levin, a Tufts biologist with a 40-person lab, has spent his life trying to prove that minds are hiding everywhere, from a plant to a scrap of skin to a single cell.

Long-held assumptions tell us that atoms with the same number of protons, neutrons and electrons are indistinguishable, but one physicist wants to put this idea to the test

In her second pop-science book, theoretical cosmologist Chanda Prescod-Weinstein returns to her celestial and cultural roots.

Stone tools dating to at least 1.04 million years ago have been found on the Indonesian island of Sulawesi. Early hominins had no boats.

New data further challenge the best scientific theory of the history and the structure of the universe. But a separate recent result reinforces it.

DNA has shown that the extinct humans thrived around the world, from chilly Siberia to high-altitude Tibet, perhaps even in the Pacific islands.

Alain Aspect, John F. Clauser and Anton Zeilinger were recognized for their experiments in an area that has broad implications for secure information transfer and quantum computing.

In “The Greatest Invention,” Silvia Ferrara offers a dizzying and entertaining tour of written language.

As a bioengineer, Linda Griffith once grew a human ear on the back of a mouse. Now she is reframing endometriosis as a key to unlocking some of biology’s greatest secrets.

Modern cities can learn from the fate of the collapsed civilizations at Ugarit and Mycenae.

Twin calamities marked the end of the Cretaceous period, and scientists are presenting new evidence of which drove one of Earth’s great extinctions.

The conditions that lead to supereruptions can emerge within a single human lifetime, according to a study of the volcano’s remnants in the national park.

The prospect of discovering the long-sought tomb of Queen Nefertiti would be momentous. It would also help Egypt’s tourism industry, which has plummeted in recent years because of political unrest.

The 85-foot-long dinosaur, whose remains were discovered in 2005 in Argentina but took years to excavate and prepare for study, is among the largest land animals ever.

An examination of animal lifestyles reveals that the most important factor linked to longer life is the ability to fly.