Life Lines by Dr. Dolittle

Sponsored by the American Physiological Society

Speaking of space…’Mighty Mice’ stay mighty muscular in space

While we are on the topic of research conducted by astronauts on the International Space Station (ISS), Space X’s 19th resupply mission to the ISS included studies that might help prevent muscle loss in astronauts as well as humans on Earth. While exercise programs have been developed for astronauts, these programs may not be as useful for long-distance space travel – such as a trip to Mars. This is where […]

Continue Reading →

Comparative Physiologist listed among the 100 most influential people of 2020

I was very excited to see Comparative Physiologist and astronaut Jessica Meir listed among Time’s 100 most influential people of 2020. Together with astronaut Christina Koch, who was also named among the top 100, the astronauts performed the first all-female spacewalk at the International Space Station in 2019. In all, the pair completed three spacewalks while aboard the International Space Station. It is hard to imagine how challenging it must […]

Continue Reading →

Extreme flight

May I have a drumroll please? The winner is…..the bar-tailed godwit!! *round of applause!!!!* The winner of what you may ask? This bird broke the world record for the longest non-stop flight – 7,500 miles – without the luxury of in-flight service. I bet it was hungry when it landed…

Continue Reading →

Getting away from salt – the transition to life on land

The transition of vertebrates from the salty ocean to life on land required the ability for these animals to change how they dealt with salt. While salt is essential for many cellular functions, salt balance must be tightly regulated to prevent illness or even death. Animals that live in a salty environment have evolved the ability to get rid of excess salt from their bodies whereas land-dwelling animals evolved the […]

Continue Reading →

Amazing dives

Researchers at Duke University recorded how long whales stay underwater during dives and made an impressive discovery. Some Cuvier’s beaked whales were capable of exceptionally long dives. While most dives were less than 78 minutes long, one animal performed a dive that lasted more than 3 hours! Interestingly, the recovery times from the dives did not appear to have a clear relationship with the dive duration. Researchers think these animals […]

Continue Reading →

Why being ‘bird-brained’ may actually be a compliment

It has long been suspected that birds (and reptiles) were not very smart because they lack a neocortex – the part of the brain that is responsible for working memory, perception, problem solving, and conscious thought in mammals. In stark contrast to this idea, studies have repeatedly shown that several species of birds have very good memories as well as planning and problem solving skills (see examples below), which has […]

Continue Reading →

Your dog’s internal compass

Apparently pooping is not the only thing dogs do that align with the Earth’s magnetic field. Hunting dogs are kind of like migratory birds in their ability to roam and find their way back to the same spot, while relying on the Earth’s magnetic field. In a new study published in eLife, the same researchers that discovered how dogs prefer to poop found that hunting dogs appear to use the […]

Continue Reading →

Researchers discover cause of hearing loss in an underground dweller

Naked mole rats are rather extreme animals in many ways. As underground dwellers, they live in chronically hypoxic environments and are blind. These animals also age more slowly than other mammals and are resistant to developing cancer even though they are long-lived. Did you also know, they are hard of hearing? In a new study published in Current Biology, researchers have discovered the cause of their hearing loss. The inner […]

Continue Reading →

Researchers explore why wild canids live longer than domestic dogs and why size matters

Ever wonder why some breeds of dogs live longer than others? Or why wild canids, such as gray wolves, live longer than similar sized domesticated dogs (20.6 vs 10-12 years)? Drs. Ana Jimenez (Colgate University, New York) and Dr. Cynthia Downs (State University of New York, Syracuse) teamed up to examine a common marker of aging in animals – oxidative stress. Oxidative stress happens when there is a build-up of […]

Continue Reading →

There it is!

Somali elephant shrews were thought to be extinct until someone caught a glimpse of this little fellow. It is the first sighting of a Somali elephant shrew in 50 years! This adorable creature is actually related to elephants and aardvarks. While they typically eat ants, researchers were able to attract this shrew using oatmeal, peanut butter, and marmite…yum!

Continue Reading →