One way archaeologists learn how ancient people, including Neanderthals, did things is to attempt to do those things themselves, a process called experimental archaeology. Normally, that involves making stone tools, butchering deer, or distilling birch tar. But in a new study, it meant doing very destructive things to teeth from one of the world’s most carefully protected animals.

That's because the archeologists suspected that Neanderthals once used rhino teeth as tools. By using the teeth to make stone tools, the researchers demonstrated that Neanderthals probably did the same thing, adding to what we know about the wide range of items in their toolkits.

We need to hit some rhino teeth with rocks for science

Some Neanderthal archaeological sites in Europe and Asia seem to have many more rhinoceros teeth lying around than you’d expect. We know Neanderthals hunted a now-extinct species of rhinoceros in Europe and eastern Asia, but the people who had inhabited these sites looked like they had been collecting rhino teeth for some reason.

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In December, the Trump administration abruptly announced it would shut down the National Center for Atmospheric Research (NCAR), a Boulder, Colorado-based facility that helps researchers perform studies of weather, climate, atmospheric chemistry, and more. The news came as a shock, given that the government had never identified serious deficiencies in the management of NCAR and its associated supercomputing center in Wyoming.

Nevertheless, the government ordered the University Consortium for Atmospheric Research (UCAR), which manages NCAR on behalf of the National Science Foundation, to help it prepare to transfer the Wyoming facility to a different operator. UCAR sued the government and, on Monday, won a preliminary injunction that places the transfer of the facility on hold.

Is that your final decision?

NCAR is what is termed a "Federally-Funded Research and Development Center" meant to support researchers in the academic community. Rather than having its own research agenda, it provides facilities, equipment, and expertise to support projects that are too large or complex for researchers to pursue on their own. NCAR has been around since the early 1960s and has become a critical resource for the global atmospheric science community.

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The race to field China's first reusable launch vehicle is far less predictable than a similar competition that played out in the United States a decade ago.

There was never any real question of which company would develop and demonstrate the first reusable orbital-class rocket in the United States. SpaceX landed a Falcon 9 booster for the first time in 2015, and a little more than a year later, it launched it back into space. It took nearly 10 years for anyone else to do the same. Blue Origin celebrated its first orbital-class booster landing last November with the successful recovery of one of its New Glenn boosters, followed by a relaunch of the same rocket in April.

In China, several companies and state-owned enterprises have a realistic shot at landing an orbital-class booster stage this year. For a time, it seemed like China's new crop of privately funded launch companies might have the advantage in accomplishing the first landing of an orbital-class booster. But Monday's launch of China's Long March 12B rocket, backed by the nearly unrestricted resources of the country's vast state-owned aerospace enterprise, suggests the industry's legacy players may now have a leg up.

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