Life is ubiquitous on Earth and appears in a diversity of forms. But what characteristics do organisms have? What makes them alive? This activity explores that question. In the first part of the ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...

The life cycle of a butterfly worksheet is a great way for kids to learn about metamorphosis in a hands-on way. From egg to caterpillar, chrysalis to butterfly, this transformation is one of nature’s ...

Scientists suspect that the complex life that slithers and crawls through every nook and cranny on Earth emerged from a random shuffling of non-living matter that ultimately spit out the building ...

What is life? Like most great questions, this one is easy to ask but difficult to answer. Scientists have been trying for centuries, and philosophers have done so for millennia. Today our knowledge is ...

This life cycle of a penguin worksheet is a fun and engaging way for kids to explore how penguins grow, from egg to adulthood. With a mix of coloring, labeling, writing prompts, and memory games, it’s ...