Rebecca Zisser / Axios

Powerful telescopes and sophisticated analytical tools are allowing scientists to see further into the cosmos. The list of places that could conceivably be home to life is growing. Last week NASA announced Saturn's moon Enceladus could support life and today scientists reported the discovery of a super-Earth in the habitable zone of a small star near our solar system.

We seem to be entering a new phase of discovery in an age-old quest to determine if there is life beyond Earth. We have targets in that search, but what exactly are we are looking for?

We asked four researchers to weigh in on that head-scratcher of a question:

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Updated 15 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Politics: Pence chief of staff Marc Short tests positive for coronavirus — COVID-19 looms over White House Halloween celebrations
  2. Health: Fauci says maybe we should mandate masks if people don't wear them — America was sick well before it ever got COVID-19
  3. World: Polish President Andrzej Duda tests positive for COVID-19.

Pence chief of staff Marc Short tests positive for coronavirus

Marc Short with Katie Miller, Vice President Pence's communications director, in March. Photo: Doug Mills/The New York Times via Reuters

Marc Short, Vice President Mike Pence’s chief of staff, tested positive for the coronavirus Saturday and is quarantining, according to a White House statement.

Why it matters: Short is Pence's closest aide, and was one of the most powerful forces on the White House coronavirus task force.

6 hours ago - World

Opposition leader Leopoldo López flees Venezuela

Venezuelan opposition politician Leopoldo López outside the Spanish embassy in Caracas, in 2019. Photo: Juan Barreto/AFP via Getty Images

Leopoldo López, a former political prisoner and prominent Venezuelan opposition leader, has left the country, his Popular Will party confirmed in a statement Saturday.

Why it matters: He's been an influential force in the push to oust President Nicolás Maduro's regime and a mentor to opposition leader Juan Guaidó. He'd been in the Spanish ambassador's Caracas residence since escaping house arrest in April 2019 following a failed military uprising.