When it comes to mammals, how big is too big?
(Phys.org) —Mammals vary enormously in size, from weighing less than a penny to measuring more than three school buses in length. Some groups of mammals have become very large, such as elephants and whales, ...
Context crucial when it comes to mutations in genetic evolution, study reports
With mutations, it turns out that context can be everything in determining whether or not they are beneficial to their evolutionary fate.
Research shows male guppies reproduce even after death
Performing experiments in a river in Trinidad, a team of evolutionary biologists has found that male guppies continue to reproduce for at least ten months after they die, living on as stored sperm in females, ...
Astrobiologists find Martian clay contains chemical implicated in the origin of life
(Phys.org) —Researchers from the University of Hawaii at Manoa NASA Astrobiology Institute (UHNAI) have discovered high concentrations of boron in a Martian meteorite. When present in its oxidized form ...
Living fossils? Actually, sturgeon are evolutionary speedsters
Efforts to restore sturgeon in the Great Lakes region have received a lot of attention in recent years, and many of the news stories note that the prehistoric-looking fish are "living fossils" virtually unchanged ...
Sexual selection in the sea
Biologists have uncovered new insights into how the male sexual behaviour of the peculiar southern bottletail squid is primed to produce the greatest number of offspring.
Researchers discover how and where breast tumor cells become dormant and what causes them to become metastatic
(Phys.org) —The long-standing mystery behind dormant disseminated breast tumor cells and what activates them after years and even decades of latency may have been solved. Researchers with the U.S. Department ...
Guppies and sexual conflict? It's a genital arms race
(Phys.org) —It's not always easy to tell if a fish is male or female: they look more or less the same. But there are exceptions, such as guppies and, as with humans, guppy genitalia varies in size across ...
Study finds starfish shed arms to protect against overheating
Study highlights risk of mosquito borne illnesses to captive orca
Researchers find lizards' frilled neck is more than just for show
(Phys.org) —Researchers have discovered that the brightly coloured frills of the iconic Australian frillneck lizard (Chlamydosaurus kingii) can be used to predict the animals fighting ability.
How gold nanoparticles can help fight ovarian cancer
Positively charged gold nanoparticles are usually toxic to cells, but cancer cells somehow manage to avoid nanoparticle toxicity. Mayo Clinic researchers found out why, and determined how to make the nanoparticles effective ...
'Whodunnit' of Irish potato famine solved
An international team of scientists reveals that a unique strain of potato blight they call HERB-1 triggered the Irish potato famine of the mid-19th century.
Evolution of lying
(Phys.org) —Ultimately, our ability to convincingly lie to each other may have evolved as a direct result of our cooperative nature.