Life
We summarize the week's scientific breakthroughs every Thursday.
- Neuroscience
Year in review: Young blood aids old brains
Ingredients in young blood can rejuvenate old mice’s bodies and brains, scientists reported in 2014.
- Genetics
Domestication did horses no genetic favors
Horses bear the cost of domestication in the form of harmful genetic variants, a study of equine DNA finds.
- Animals
The dinosaurs in the backyard
Chickens are some of the closest relatives of dinosaurs, and though genetic tinkering the birds might even one day be turned into tiny dinos.
- Genetics
Year in review: Genes linked to tameness
A look at the genes of domesticated animals offers possible insights into why taming has altered animals’ appearances.
- Animals
Year in review: Insect, bird evolution revisited
Insects got an entirely new family tree after an extensive genetic analysis rearranged the creatures' relations.
- Genetics
Year in review: Easy stem cells a no go
An incredibly easy method for making stem cells turned out to be impossible, again tainting the stem cell research field with controversy.
- Life
Images reveal secrets of zinc sparks
These sparks are created when billions of zinc atoms shoot from thousands of small pouches nestled just beneath the surface of a mouse egg cell.
- Life
Source of sperm and egg’s zinc sparks identified
Detailed imaging reveals the origin of zinc sparks that fly when egg meets sperm in mammals.
- Neuroscience
Year in review: The nose knows a trillion odors
Humans can suss out more than 1 trillion different smells, a 2014 study estimated.
- Archaeology
Year in review: Roster of dinosaurs expands
With the discovery of several new species and a few dogma-shaking revelations, dinosaurs got a total rethink in 2014.
- Animals
Year in review: The post-pigeon century
Birds' troubles received an eerie emphasis in the news when biologists marked the 100th anniversary of the death of the last known passenger pigeon.
- Genetics
Year in review: Life’s complexity recoded
New genetic letters in bacteria and a simplified yeast chromosome showcase scientists' advances in understanding the simplicity and complexity of life.
