A comparative cytogenetic analysis of eight Malagasy mantelline frogs shows that chromosome number reduction from 2n = 26 to ...

After episode 15, and before episode 16. A 50-year-old guy takes a peek at the "little ocean" brought inside an egg.[Insert title image here: cover.png]In episode 15, I saw eggs leaving the water."Oh.

"Pollen has landed on the pistil. Therefore, it is fertilized."If your child answers that way, the first part is correct. The part where pollen lands on the pistil is visible.However, what happened ...

The transition from tadpole to juvenile frog is never easy — legs sprout, tails shrink and lungs develop for a life on land, all while being hunted by fish and other predators. Talk about growing ...

Late last week, we started seeing headlines about how new research was suggesting we might have two brains instead of the one that seems to show up on MRI scans. As is so often the case, these rumors ...

The study is believed to be the first time human colon organoids have been successfully tissue engineered in this manner. The technology allows diseases of the colon to be studied in unprecedented ...

A popular vanilla flavoring in e-cigarettes may interfere with some of the earliest steps of human development. In lab experiments, vanillin caused embryonic stem cells to lose their ability to ...

Read all the way to the end – we save the one detail most people never think about for last. Nature never ceases to amaze us with its extraordinary diversity, particularly when it comes to ...

Research led by the University of Cambridge Loke Center for Trophoblast Research has shown that a genome-editing technique can be used to alter a single gene in human embryonic cells, enabling the ...

Researchers relied on a newer gene-editing technique that may make it possible to engineer embryos, a prospect that has long alarmed bioethicists. By Carl Zimmer Scientists at Columbia University have ...

Harvard University researcher Kseniia Petrova, 30, departs the John Joseph Moakley United States Courthouse after being released on bail from federal custody in June 2025, in Boston. (AP Photo/Leah ...