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Another wave of bird extinctions in the Americas?

Several bird species are taking their final bows on the global evolutionary stage, and winking out. The situation in northeast Brazil is particularly dire.

Astronomers await pings from troubled Hitomi

An unknown disaster seems to have befallen the Japanese satellite that launched in February. Why X-ray astronomers are anxious for good news.

Watch giant ice bridge collapse

An ice bridge collapsed at Perito Moreno Glacier in Argentina earlier this month. Hundreds of tourists and locals gathered to witness the dramatic event.

Could our sun emit killer superflare?

Solar eruptions from our sun are nothing compared to eruptions from some other stars - so-called 'superflares'. Two scientists say our sun could also be a superflare star.

Getting to know Pluto

After last summer's Pluto flyby, the New Horizons spacecraft started sending data to Earth – at 2 kilobits per second. What scientists have learned so far from that rich, slow cache.

What happens to its stuff when black hole vanishes?

A new theory lets scientists follow a black hole's life over time.

Mysterious chimp behavior evidence of sacred rituals?

Groundbreaking video footage could change the way we look at our closest relatives.

Bacteria from Sahara on Swiss glaciers

Bacteria living among dust particles from the African Sahara Desert have been found trapped in ice and snow high on the Swiss Alps.

Moons might hold key to finding E.T. life

As the list of known planets beyond our solar system grows, the search for their moons is intensifying. Why exomoons might be key to E.T. life.

Is ‘Planet 9’ a second Kuiper Belt?

Is there a 9th planet - a super-Earth - as yet undiscovered in our solar system? Researchers present an alternative view, not a planet, but many small objects.

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