Vacunacionadultos

Five-eyed fossil shrimp is evolutionary ‘missing link’

The discovery of a five-eyed shrimp-like creature that lived about 520 million years ago may end a long-running debate about the evolution of Earth’s most common animals.

Arthropods, ranging from lobsters and crabs to spiders and millipedes, make up around 80 percent of all animal species alive today and are characterised by their hard exoskeleton.

But their evolution has long remained something of a mystery, because their ancient ancestors carry a variety of features that their modern counterparts do not.

Enter Kylinxia zhangi, a shrimp-like creature preserved in fossils found in China’s Yunnan province — a discovery that researchers now say could be a key “missing link” in arthropod evolution.

Like today’s arthropods, Kylinxia had a hard shell, a segmented body and legs with joints.

But the ancient creature also had characteristics in common with even older animals, leading researchers to name it after the “Kylin”, a creature in traditional

Read More

Hurricane Zeta could link up with a cold front, bringing snow to New England

It was quite the dreary Monday across the region, with clouds hanging tough all day in combination with the cool temperatures. I wish I had better news for tomorrow, but even if the low clouds dissipate, I still think we’re going to contend with a mainly cloudy morning. Finally, we have the chance for some sunshine trying to develop tomorrow afternoon.

Clouds continued to stream north Monday afternoon.
Clouds continued to stream north Monday afternoon.COD Weather

There will actually be even cooler air filtering in throughout the afternoon, so temperatures will hold in the 40s over inland areas, but eventually make it into the 50s right along the coastline. Think of tomorrow as perhaps feeling a little bit better, if we can get the sunshine, even though temperatures will be quite similar.

High temperatures Tuesday will reach only the lower to middle 50s.
High temperatures Tuesday will reach only the lower to middle 50s.NOAA

Wednesday is definitely my pick of this work week. On that day

Read More

Amid Wisconsin coronavirus outbreak, researchers explore link between college cases, nursing home deaths

For most of 2020, La Crosse’s nursing homes had lost no one to covid-19. In recent weeks, the county has recorded 19 deaths, most of them in long-term care facilities. Everyone who died was over 60. Fifteen of the victims were 80 or older. The spike offers a vivid illustration of the perils of pushing a herd-immunity strategy, as infections among younger people can fuel broader community outbreaks that ultimately kill some of the most vulnerable residents.

“It was the very thing we worried about, and it has happened,” Kabat said.

Local efforts to contain the outbreak have been hamstrung by a statewide campaign to block public health measures, including mask requirements and limits on taverns, he added. “Your first responsibility as a local government is really to protect the health and safety and welfare of your residents,” he said. “When you feel like that’s not happening and you have

Read More

Siberian scientists breeding foxes for pets eye human link

Soaking up the sun in their garden, Sergei Abramov and his wife Tatiana are playing with their furry pet, Plombir, who is wagging his tail and winning treats for obeying his owners’ commands.

But Plombir, whose white fur matches the colour of the beloved Soviet ice cream he was named after, is not Abramov’s canine best friend.

He is actually a fox, bred by Russian scientists as part of a decades-long experiment in Siberia to study how wild animals are domesticated.

Plombir is happy to be led around by his owners on a leash, but, as he pulls towards chickens safe in their cage, it’s clear he hasn’t lost all his animal instincts. 

“Yes, he already tried to eat our chickens and run away,” says Abramov, 32, who lives in the suburbs of Russia’s third largest city Novosibirsk.

His wife, biologist Tatiana Abramova, 33, admits she always wanted to live

Read More