Paleontology
Sloths once came in a dizzying array of sizes. Here’s why
A new fossil and DNA analysis traces how dozens of sloth species responded to climate shifts and humans. Just two small tree-dwelling sloths remain today.
Life
We summarize the week's scientific breakthroughs every Thursday.
More Stories in Life
- Animals
A ‘talking’ ape’s death signals the end of an era
Kanzi showed apes have the capacity for language, but in recent years scientists have questioned the ethics of ape experiments.
- Science & Society
Some science seems silly, but it’s still worthwhile
The Salmon Cannon and the Levitating Frog contends that curiosity-driven research helps us understand the world and could lead to unexpected benefits.
- Genetics
What gene makes orange cats orange? Scientists figured it out
Researchers found the gene and genetic variation behind orange fur in most domestic cats, solving a decades-long mystery.
- Plants
Cryopreservation is not sci-fi. It may save plants from extinction
Not all plants can be stored in a seed bank. Cryopreservation offers an alternative, but critics question whether this form of conservation will work.
- Paleontology
This exquisite Archaeopteryx fossil reveals how flight took off in birds
Analyses unveiled never-before-seen feathers and bones from the first known bird, strengthening the case that Archaeopteryx could fly.
- Animals
Wild chimpanzees give first aid to each other
A study in Uganda shows how often chimps use medicinal plants and other forms of health care — and what that says about the roots of human medicine.
- Plants
A leaf’s geometry determines whether it falls far from its tree
Shape and symmetry help determine where a leaf lands — and if the tree it came from can recoup the leaf’s carbon as it decomposes.
- Health & Medicine
Humans have shockingly few ways to treat fungal infections
It's not quite as bad as The Last of Us. But progress has been achingly slow in developing new antifungal vaccines and drugs.
- Animals
This tool-wielding assassin turns its prey’s defenses into a trap
This assassin bug's ability to use a tool — bees’ resin — could shed light on how the ability evolved in other animals.
