Mapping cells, Maras in Dubai, Relativity, Present Perfect

Caty Weaver and Mario Ritter Jr. host today's Learning English show.
First: The human body has an estimated 37.2 trillion cells. Each kind of cell has a unique job. Knowing each cell’s job can help scientists better understand health and diseases such as cancer. Anna Matteo reports about the creation of an early version of a map of some of the human body’s cells.(00:57) learningenglis...
Then: A rare Argentinian animal, the Patagonian mara, is now populating in Dubai, researchers say. Scientists do not know how the animals got to the country. Mario Ritter Jr. has the full story. (06:05) learningenglis...
Next: The LE Science and Technology Report. International researchers using observations by an instrument in Arizona have found evidence supporting the general theory of relativity. The findings show that galaxies affected by the universe’s expansion behave in ways predicted by the theory. John Russell reports. Then, Mario welcomes John to the studio to further discuss the special NASA system called DESI that records data on dark energy in the universe. (11:00) learningenglis...
Finally: The LE Lesson of the Day. Andrew Smith and Jill Robbins base their instruction on the LE video series, Let's Learn English, Level 2. Today, they explore some useful English expressions, tell about terms known as logical connectors and discuss the present perfect tense, with a focus on the word "since." (18:42) learningenglis...
Caty and Mario close the show.
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