Sloth size and habitat shifted multiple times over the past 35 million years, but human hunting likely drove the slower, ...

Learn how ash from volcanic eruptions can alter ice content in clouds, influencing how Earth handles radiation.

Learn more about why we trust people from a low socioeconomic background over those who grew up with privilege.

Understanding historical bacteria evolution could lead to better infection control in the future.

Learn why more people are choosing dogs over having children and what this says about modern families.

Learn why antidepressants are the new hot topic in cancer research, as they can boost the immune system to fight tumor cells.

Learn how dishwashers release microplastics and nanoplastics that pose environmental risks through polluted wastewater.

Observations show a stronger galaxy piercing a weaker one with a lance of radiation, reducing its star-making ability.

Learn how these tiny clownfish, famous for their role in the “Finding Nemo” films, survive the trouble of heatwaves.

Although there is no exact comparison to any known bacterium on Earth, the space bacteria shares some key genetic ...

As the Hubble Space Telescope celebrates 35 years in space, here's what to know about the ambitious instrument.

Learn why both human teeth and an ancient fish contain a key sensory substance — but in different locations.