This tool-using cow defies expectations for bovine braininess
Veronika the cow uses a brush as a tool to scratch herself, revealing rare problem-solving skills and expanding what we know of tool use in animals.
Veronika the cow uses a brush as a tool to scratch herself, revealing rare problem-solving skills and expanding what we know of tool use in animals.
We summarize the week's scientific breakthroughs every Thursday.
Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.