The behavior of optimal control in high-order problems lacks precise characterization. Even the existence of the chattering phenomenon, i.e., the control switches infinitely many times over a finite ...

The UK Health Security Agency (UKHSA) said the individual in the West Midlands region "had close and prolonged contact with a large number of infected birds", but would not say where the farm was.

What do the Christmas Bird Count (CBC), John James Audubon, and my boyhood have in common? Answer: the evolution of all three had their beginnings with “a bird in the hand.” As a young boy, with my ...

Read more to find out why some bird pairs stay together and others decide it's time to part ways. Why some bird couples stay together while others 'divorce': New study reveals surprising insights ...

The pair had a failed egg on their first attempt, then fledged a chick on their second. Their first chick was our Royal Cam chick for 2019, Karere. Read about Karere. Last season Royal Cam began a ...