Increasing salinity in fresh water causes more bacteria to be released into the air. (AP Photo/Julio Cortez)
Increasing salinity in fresh water causes more bacteria to be released into the air. (AP Photo/Julio Cortez)Increasing the saltiness of freshwater changes the number and types of bacteria that are launched into the air by breaking waves and bursting bubbles, which could have implications for the risk that people will be exposed to toxins from harmful algal blooms in the future.

Hormone therapy for some transgender people may lead to hypertension. (AP Photo/Gerry Broome)
Hormone therapy for some transgender people may lead to hypertension. (AP Photo/Gerry Broome)Transmasculine people’s blood pressure increased after starting hormone therapy, while the opposite trend was seen in transfeminine participants, according to the largest and longest study of its kind.

Robotic earthworms might be human helpers in the near future. (AP Photo/Dean Fosdick)
Robotic earthworms might be human helpers in the near future. (AP Photo/Dean Fosdick)Inspired by the efficient behavior of insect muscles, researchers have developed tiny electrostatic actuators that could have wide-ranging applications in robotics. Their innovations include earthworm-scale robots designed to inspect tight spaces, such as the inside of aircraft engines or dangerous debris fields.

Researchers have developed a new method to prevent heart failure in mice.(AP Photo/Robert F. Bukaty)
Researchers have developed a new method to prevent heart failure in mice.(AP Photo/Robert F. Bukaty)Researchers have developed a compound that blocked an important regulator of heart failure in mice, which could pave the way toward future therapeutics for the often fatal condition.

CRISPR is not quite ready for one of its biggest hoped-for purposes. (AP Photo/CDC)
CRISPR is not quite ready for one of its biggest hoped-for purposes. (AP Photo/CDC)CRISPR caused unintended changes to the genetic code in 16% of human embryo cells in a new study, and its authors say the findings highlight that more research is needed before the gene-editing tool is safe for human fertility applications.

Maine's favorite crustacean hears with more than just its antennae. (AP Photo/Robert F. Bukaty)
Maine's favorite crustacean hears with more than just its antennae. (AP Photo/Robert F. Bukaty)Researchers have discovered that American lobsters can hear low frequencies, and that the mechanism for their hearing rests in external hairs on the surface of their exoskeleton, not in their antennae, as had been assumed.

A rat study gives new clues about the damage childhood stress can do that leads to PTSD. (Pixabay/Shutterbug75)
A rat study gives new clues about the damage childhood stress can do that leads to PTSD. (Pixabay/Shutterbug75)Rats that were exposed to a highly distressing event as juveniles experienced changes in brain regions responsible for processing emotions and detecting danger, offering new clues about the mechanisms that can lead to post-traumatic stress disorder in humans, following adverse events during childhood.

Urban oil wells have health impacts for the surrounding neighborhoods. (Nicole Wong)
Urban oil wells have health impacts for the surrounding neighborhoods. (Nicole Wong)People who live near active or dormant oil wells have poorer lung function than those whose homes are farther away, according to a study of two predominantly low-income Black and Latinx neighborhoods in South Los Angeles.

Researchers have tracked down a part of the brain that goes haywire in rats when they crave drugs. (Pixabay/sipa)
Researchers have tracked down a part of the brain that goes haywire in rats when they crave drugs. (Pixabay/sipa)French researchers have linked abnormal activity in a specific part of the brain to compulsive cocaine seeking in rats, identifying a potential biomarker for addiction and method of treatment through deep brain stimulation.

Genetic material from older COVID-19 viruses found in dust could help in outbreak tracking. (NIAID/NIH via AP, File)
Genetic material from older COVID-19 viruses found in dust could help in outbreak tracking. (NIAID/NIH via AP, File)Researchers have found that the genetic material from the virus that causes COVID-19 can be extracted from indoor dust long after the virus is inactive, which could prove a useful tool for monitoring outbreaks of the disease.

The new frontier in lung cancer detection involves the breath from those lungs. (AP Photo/Jacquelyn Martin)
The new frontier in lung cancer detection involves the breath from those lungs. (AP Photo/Jacquelyn Martin)A new test that detected lung cancer from exhaled breath with 96% accuracy is simpler and faster than similar breath tests, according to researchers, who suggest their advance is a step toward improved diagnostics for the prevalent disease.

Illustrations of Gray's beaked whales; a female is depicted on top and a male on bottom. (Mark Camm)
Illustrations of Gray's beaked whales; a female is depicted on top and a male on bottom. (Mark Camm)A new DNA analysis of stranded Gray's beaked whales, a species rarely observed alive, demonstrated with the highest accuracy yet that the population is large and has high genetic diversity, factors that will help it avoid being threatened by global warming and other ecosystem changes like many other whales are.