WASHINGTON, Oct 16 (Reuters) – Congressional lawmakers
criticized the government’s response to Ebola in the United
States on Thursday as some called, at a congressional hearing
probing efforts to contain the virus, for a ban on travel from
epidemic-stricken West Africa.
Federal Aviation Administration chief Michael Huerta told
reporters separately that the United States is assessing whether
to issue a travel ban “on a day-to-day basis” but that the U.S.
Centers for Disease Control and Prevention (CDC) had determined
that a ban would not address the challenges posed by Ebola.
WASHINGTON (Reuters) – Tornadoes in the United States are increasingly coming in swarms rather than as isolated twisters, according to a study by U.S. government meteorologists published on Thursday that illustrates another trend toward extreme weather emerging in recent years.
Looking at tornado activity over the past six decades, the study in the journal Science found the total number of tornadoes annually remaining rather steady, averaging 495. Since the 1970s, there have been fewer days with tornadoes but plenty more days with many of them, sometimes dozens or more.
WASHINGTON (Reuters) – Kangaroos hop, right? Well, not all of them.
Scientists said on Wednesday that a biomechanical and statistical analysis of fossil bones of a group of huge extinct kangaroos shows that the largest of the bunch in all likelihood could not hop as their modern-day relatives do with aplomb.
The study focused on a group of big-bodied, short-faced kangaroos called sthenurines that lived in Australia from about 13 million years ago until about 30,000 years ago, disappearing after the first humans arrived on the continent.
WASHINGTON, Oct 9 (Reuters) – How do you make a better snake
robot? You study snakes, of course.
Researchers on Thursday said they conducted experiments to
learn precisely how sidewinder rattlesnakes are able to climb
sandy hills, then applied the reptiles’ repertoire to an
existing snake robot so it could do the same thing.
WASHINGTON (Reuters) – Prehistoric paintings at least 40,000 years old that depict animals – including one known as a “pig-deer” – and the outline of human hands in seven caves on the Indonesian island of Sulawesi are rewriting the history of art.
Scientists said on Wednesday they used a highly precise method to determine the antiquity of the paintings. They found the artwork was comparable in age to the oldest-known rock art from Europe, long thought to be the cradle of the early human cultural achievement embodied by cave painting.
WASHINGTON (Reuters) – New research that sheds light on the methods and machinery used by HIV to infect cells provides insight into the tricky virus that potentially could guide the development of a vaccine against the virus that causes AIDS, according to U.S. government and other scientists.
Separate studies published on Wednesday describe in detail the structure and dynamics of the spike on the surface of the human immunodeficiency virus that it employs to fuse with and enter cells.
WASHINGTON, Oct 5 (Reuters) – It’s no secret that if your
dad is tall and your mother is tall, you are probably going to
be tall. But fully understanding the genetics of height has been
a big order for scientists.
Researchers on Sunday unveiled what they called the biggest
such study to date, analyzing genome data from more than a
quarter million people to identify nearly 700 genetic variants
and more than 400 genome regions relating to height.
WASHINGTON (Reuters) – Scientists have devised a new map of the Earth’s seafloor using satellite data, revealing massive underwater scars and thousands of previously uncharted sea mountains residing in some of the deepest, most remote reaches of the world’s oceans.
The researchers said on Thursday they used gravity measurements of the seafloor from radar equipment aboard the European Space Agency’s CryoSat-2 satellite and NASA’s Jason-1 satellite to capture underwater geological features in unprecedented detail.
WASHINGTON (Reuters) – Cheetahs can aptly be called the race cars of the animal kingdom: sleek, graceful and supremely speedy.
Scientists have now taken a bit of a look under the hood of these feline Ferraris to gauge how much energy they burn as they traverse their African habitats and to gain insight into factors that may be contributing to their precipitous population plunge.
WASHINGTON (Reuters) – The 3,000-mile (4,800-km) mass migration of monarch butterflies in North America is one of the insect world’s fantastic feats, with millions embarking on the arduous journey from as far north as Canada down into Mexico and the California coast each autumn.
Scientists who scoured the genome of these colorful insects offered new insight on Wednesday into this annual airborne adventure. They pinpointed a single gene related to flight muscle efficiency that plays a major role in the monarch butterfly’s migration.