Viruses—lots of them—are falling from the sky

An astonishing number of viruses are circulating around the Earth's atmosphere – and falling from it – according to new research from scientists in Canada, Spain and the U.S.

SpaceX rocket explodes during test flight

A SpaceX rocket exploded in midair during a test flight, though no one was injured, as the company seeks to develop a spacecraft that can return to Earth and be used again.

Under California: An ancient tectonic plate

(Phys.org) —The Isabella anomaly—indications of a large mass of cool, dehydrated material about 100 kilometers beneath central California—is in fact a surviving slab of the Farallon oceanic plate. Most of the Farallon ...

Giant Sequoias Yield Longest Fire History from Tree Rings

(PhysOrg.com) -- California's western Sierra Nevada had more frequent fires between 800 and 1300 than at any time in the past 3,000 years, according to a new study led by Thomas W. Swetnam, director of UA's Laboratory of ...

US ramping up private sector's role in spaceflight

The first flight of a commercial vessel to the International Space Station in late April will signal a bigger role for the private sector and open up space tourism opportunities, industry experts and lawmakers say.

Ladybug, where have you gone? Aphid fighters tend to roam

To some casual observers, ladybugs (or lady beetles) are colorful symbols of good luck—harbingers of fortune and fame. Gardeners value them for their utility as ravenous insects that prey upon plant pests. They buy them ...

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