In the News:
Lions and Elephants in North America? - Some
scientists have proposed a controversial solution to the endangered species
in Africa: Establish new populations in North America. The plan, which
appeared last month in the journal Nature, came out of a conservation
retreat at media mogul Ted Turner's New Mexico ranch. The scientists who
came up the idea say it could help save some species, like lions, elephants
and cheetahs from extinction in Africa were habitats are vanishing and
poachers are prevalent. They also argue that this approach could restore
biodiversity in North America as it was before humans overran the landscape
more than 10,000 years ago. While acknowledging that the African animals
being considered never lived in the North American, supporters of the
idea point out that they did once have counter-parts in the western hemisphere:
Mastodons, American cheetahs, and saber-toothed cats. Critics of the idea
point out that past attempts to establish wildlife in places they were
not native have often caused ecological disasters. Public acceptance of
such a plan including dangerous predators like lions seems questionable
given the resistance by some people to the reestablishment of native predators
like wolves.
Wild Chimps Show Hand Preference- A study released
by scientists shows that 17 wild chimpanzees in Gombe National Park in
Tanzania prefer the use of one had over the other just as people do for
some delicate tasks. Although observations of captive chimps has shown
this in the past, the close association of those captive animals with
the humans who raised them have made scientists wonder if wild chimps
would have the same trait. While the chimps do not seem to have as strong
a preference to using right or left as humans, the fact that they do at
all suggests that the left-brain/right-brain split associated with hand
preference evolved at least 5 million years ago from a common ancestor.
Stopping Light - Scientists at the Australian
National University have managed to stop light inside a crystal for up
to one second. This is 1,000 times longer than the previous record. The
team thinks that by using the current material they can trap the light
for as long as one minute. Other materials may let them hold the light
for as long as an hour. Being able to stop and control light is one task
scientists must master before they will be able to build optical computers
(sometimes referred to as quantum computers) that will be many times faster
than the conventional computers we use today.
Neanderthal's Like a Good Mammoth Steak - A study
published last month in the Journal of Human Evolution suggests
that Neanderthal's had a taste for large game like woolly mammoths and
bison as opposed to smaller game which might have been easier to hunt.
The results of the study were based on the 16,000-year-old "Magdalenian
woman" skeleton from a site called Saint-Germain-la-Rivière in France.
Researchers collected bone collagen from the remains which contain isotopes
from carbon and nitrogen that were originally in proteins consumed by
the woman. These proteins could then be matched up with the animals that
were the meat source. The scientist's think that the preference bison
and mammoth means Neanderthals must have hunted in organized groups in
order to be able to bring down such large game.
Asteroid Hits Antarctica - According to scientists
at Australia's Davis station in Antarctica, a significantly large asteroid
hit Earth in September of 2004. Fortunately the impact was in an uninhabited
portion of Antarctica, but if the object had slammed into a city it would
have destroyed it. The asteroid was the size a bus and weighed about 1000
tons and was traveling at about 150 miles per second. Dr Andrew Klekociuk
who was on duty observing the stratosphere that night got a strange signal
from30 kms overhead. At first it was thought to be a problem with the
equipment, but later it was determined that a asteroid had hit the ground
approximately 800 miles from the station. It is thought to be the biggest
asteroid to hit the Earth in the last ten years.
|
Ask the
Curator:
Past Sea Serpents - I have long found the subject
of Sea Serpents fascinating, and have collected many books on the subject.
My most recent purchase (The Great New England Sea Serpent) by J.P. O'Neill.
After reading this book, and others I'm convinced that there may be something
to these sighting. However, assuming these creatures do exist do you have
a theory as to why none appear in the fossil recorded? - John
It depends what you mean by
appearing in the fossil record. Certainly the Jurassic seas were filled
with all kinds of marine reptiles that if they were alive today would
fit the description of a sea serpent (check
out http://www.unmuseum.org/searepti.htm). However, these creatures
seemed have disappeared about the same time the dinosaurs met their end
roughly 65 million years ago. More recently the zeuglodon, a primitive
form of whale, might easily be mistaken for a sea serpent if it had been
alive today, though it is a mammal, not a reptile. (http://www.unmuseum.org/zeuglodo.htm)
In the 19th century an unscrupulous promoter actually cobbled together
several zeuglodon skeletons and exhibited them as an extinct sea serpent.
Zeuglodons are found in the fossil record as recently 37 million years
ago.
Can we find more recent fossil
evidence for sea serpent-type creatures? It will be hard. The best place
to find ancient sea creature fossils are in ancient sea beds. The geology
of the planet changes so slowly that most of the more recent sea beds,
where we would expect to find evidence for any sea serpent-like creature
that has developed over the last few million years, are still at the bottom
of the oceans and inaccessible to us.
Lack of evidence is no proof
of existence, of course, so what we have now are simply tantalizing stories
like we find in O'Neill's book. Suggestive and intriguing, but until somebody
comes up with a well-preserved body, no proof.
|
On the
Tube:
Currently
we are only able to give accurate times and dates for these programs in
the United States. Check local listings in other locations.
NOVA - Origins: Where Are the Aliens?- Journey
back to the beginning of everything: the universe, Earth, and life itself.
On the PBS: September 6 at 8 p.m. ET/PT
NOVA - Mystery of the Megaflood- What unleashed
a catastrophic flood that scarred thousands of square miles in the American
Northwest? On the PBS: Tuesday, September 20 at 8 p.m. ET/PT
America's Loch Ness Monster - Bordering New York
and Vermont and known as America's Loch Ness, Lake Champlain is home to
a monster named Champ. Experts use the latest technology in an attempt
to prove the existence of this giant, sea serpent-like creature On the
Discovery Channel: Sep 03 @ 09:00 PM, Sep 04 @ 12:00 AM ET/PT
Alexander the Great: Murder Unsolved - Unravel
one of the strangest mysteries of ancient times, the suspicious death
of history's most extraordinary leader, Alexander the Great. Experts attempt
to decipher if his early death at age 32 was caused by disease, excessive
drinking or even murder. On Science Channel: Sep 19 @ 10:00 PM, Sep 20
@ 01:00 AM, Sep 20 @ 05:00 AM, Sep 20 @ 11:00 AM, Sep 20 @ 03:00 PM, Sep
24 @ 06:00 PM ET/PT.
If We Had No Moon - Examine what life would
be like if a major space collision with the Earth had not created its
moon. Each day would last four hours, winds would blow with hurricane
force, and Earth would be shrouded in a dense, toxic atmosphere. On The
Science Channel: Sep 25 @ 10:00 PM, Sep 26 @ 01:00 AM, Sep 26 @ 05:00
AM, Sep 26 @ 11:00 AM ,Sep 26 @ 03:00 PM ET/PT.
Parallel Universe - The strange notion of parallel
universes is gaining strength in the scientific community and may solve
our most basic questions about the universe, including the origins of
the Big Bang itself. On Science Channel: Sep 20 @ 09:00 PM, Sep 21 @ 12:00
AM, Sep 21 @ 04:00 AM, Sep 21 @ 10:00 AM, Sep 21 @ 02:00 PM, Sep 25 @
05:00 PM ET/PT.
Killer Asteroids-Eventually an asteroid will
hit the earth. Britain and the U.S. are developing the technology to protect
the world from an asteroid impact. Find out what progress has been made
in the real star wars. On Science Channel: Sep 04 @ 05:00 PM, Sep 13 @
09:00 PM, Sep 14 @ 12:00 AM, Sep 14 @ 04:00 AM, Sep 14 @ 10:00 AM, Sep
14 @ 02:00 PM, Sep 18 @ 05:00 PM ET/PT.
Alaska's Bermuda Triangle. - There's something
about Alaska that the tourist bureau doesn't want you to know. In Alaska,
people, planes, and ships disappear. Suddenly, inexplicably, and permanently!
Natives say that shape-shifting spirits kidnap lost travelers. Scientists
tell of giant crevasses that swallow the unwary. Others tell of conspiracies
to wreck aircraft. We take a detailed look at the 1972 incident that confounded
the US military, when an airplane carrying two Congressmen vanished between
Anchorage and Juneau. On History Channel: September 3 @ 8pm ET/PT.
UFO Files UFO Hot Spots - For those who study
the UFO phenomenon, "UFO Hot Spots" are places around the globe known
for a long history of UFO sightings and reports. From Brazil to Mexico,
from Washington State to Florida, multiple witnesses, including air traffic
controllers and even military personnel, confirm that something unexplained
is repeatedly happening in the night sky. Tales of alien abductions, bizarre
and chilling photographs of UFOs, and hours of videotape all abound as
we search for UFO Hot Spots. On History Channel: September 12 @ 8pm ET/PT.
|