MS-LS4-6
Use mathematical representations to support explanations of how natural selection may lead to increases and decreases of specific traits in populations over time.
- Animals
Tasmanian devils begin to resist infectious cancer
A deadly contagious cancer is spreading among Tasmanian devils. But the animals are evolving resistance, a new study finds.
- Genetics
Explainer: What is epigenetics?
Epigenetics is the study of molecular “switches” that turn genes on and off. Tweak those switches and there could be big health consequences.
- Brain
Our eyes can see single specks of light
The human eye can detect a single photon. This discovery answers questions about how sensitive our eyes are. It hints at the possibility of using our eyes to study issues of quantum-scale physics.
- Life
How a moth went to the dark side
Peppered moths and some butterflies are icons of evolution. Now scientists have found a gene responsible for making them so.
- Animals
The turning of wolves into dogs may have occurred twice
The process of turning wolves into dogs, called domestication, may have occurred twice — in the East and the West — ancient DNA suggest.
- Humans
Slicing meat may have aided human evolution
An experiment with modern-day humans shows how slicing meat could have saved human ancestors energy — and let their bodies and brains get bigger.
- Health & Medicine
Chikungunya wings its way north — on mosquitoes
A mosquito-borne virus once found only in the tropics has adapted to survive in mosquitoes in cooler places, such as Europe and North America.
- Microbes
The bugs within us
Hordes of bacteria live inside people and other animals. This ‘microbiome’ can affect the development of the blood-brain barrier, food choices — even mating.
- Animals
Return of the bed bug
Bed bugs have staged a comeback over the past 15 years. The bloodsucking parasites succeeded through a combination of evolution and luck.
- Animals
Mates or survival: Which explains a bird’s color?
When male birds are brightly colored, we assume that’s because their plumage attracts the gals. But a new study with thousands of museum specimens shows that sometimes survival is just as important a factor behind bird color.
- Physics
Eyelashes: The ‘sweet’ length
New mathematical and aerodynamics studies find what seems to be the optimal length for eyelashes — the length that protects best. And surprise: Longer is not always better.
- Animals
Ocean animals have mushroomed in size
Compared to a half-billion year ago, sea creatures are, on average, roughly 150 times bigger, a new study finds.
