why do polar bears need sea ice to survive

why do polar bears need sea ice to survive

Polar bears are losing life-sustaining sea ice crucial for hunting, resting and breeding in all 19 regions of the they inhabit, a study warned on Wednesday. As climate change pushes up Arctic temperatures, ice is melting earlier in spring and refreezing later in autumn, a team of researchers reported in the Cryosphere, a journal of the European Geosciences Union. Satellite data revealed that the total number of ice-covered days across the 19 regions declined at a rate of seven to 19 days per decade from 1979 to 2014, the researchers said. БTheir dependence on sea ice means that climate warming poses the single most important threat to (polar bearsБ) persistence,Б wrote the team. The global population of polar bears ( Ursus maritimus) is estimated at about 25,000, said the study. The

 why do we get diarrhea when sick

why do we get diarrhea when sick

is one of the least pleasant parts of dealing with a stomach bug. But according to a new Brigham and Womenвs Hospital published in Cell Host and Microbe, it s a blessing in disguise: You re essentially pooping out the bacteria that made you sick. The researchers infected mice with Citrobacter rodentium, which affects them in a similar way to how E. coli affects us. Within two days, they produced proteins called interleukin-22 and claudin-2, which lead to diarrhea. After the mice got the runs, they had fewer pathogens in their bodies, and their illnesses cleared up, according to a. Some mice didn t produce these proteins, and their intestines suffered more injuries, Medical Daily reports. The authors think our bodies produce interleukin-22 and claudin-2 to get bacteria out of our systems

 why do we need to obey god

why do we need to obey god

It s puzzling. When I speak on living by faith I often ask, How many of you know that Jesus calls us to love our enemies? Everyone nods and says they know this. Then I ask, How many of you know the reason Jesus gives for why we should love our enemies? Almost always the response is the same в very few know the reason. Why don t we know the reason? Are we so good at loving our enemies that we don t need Jesus reason? Um в no. I m not so good at loving my enemies. And I m pretty sure we all need help in this. And yet we remember only the command в but not the reason Jesus gives to help us obey the command. What is the reason? Here s what Jesus taught inВ Luke 6:35, But love your enemies, and do good, and lend, expecting nothing in return, and your reward will be great. Jesus motivates our

 why do newborn babies sleep so much

why do newborn babies sleep so much

We all want our babies to sleep but can you have too much of a good thing when it comes to baby sleep? We ve written before about, but what if your baby suddenly start sleeping more than usual? What if you re suddenly seeing marathon naps, later-than-usual morning wake-up times, and finding that you need to bump up bedtime? That makes lots of parents worry. So what s behind this sudden onset of sleepiness? Why is your baby sleeping more than usual? We re sharing 3 common reasons keep reading for details! 3 Reasons Your Baby Is Sleeping More Than Usual If your baby suddenly start sleeping more than usual, and seems extra-sleepy, it s likely one of the following three reasons is to blame: Your baby is sleeping more than usual due to a growth spurt. Growth spurts are typically the

 why do we have to pay sales tax

why do we have to pay sales tax

Protective services typically include a communityвs police and fire departments. Communities or municipalities also may use other protective services at special times during the year. State, county and local protective services usually represent the other major portion of sales tax expenditures. Local municipalities often use voluntary fire department services to alleviate some of the costs associated with protective services. However, sales tax revenue is needed to pay for the facilities and vehicles relating to voluntary fire departments. Police departments also can be reduced to save on the amount of sales tax needed. Rather than using individual police departments in every local municipality, the county police handle local jurisdictions. Every around April 15, you'll hear adults of

 why do phospholipids form a bilayer in water

why do phospholipids form a bilayer in water

The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails. The tails are usually fatty acids and they can differ in length. Hydrophilic molecules dissolve readily in water because they contain charged groups or uncharged polar groups, that can form either favourable electrostatic interactions or hydrogen bonds with water molecules Hydrophobic molecules are insoluble in water because all or most of their atoms are uncharged and non polar. They cannot form energetically favourable interactions with water molecules. If dispersed in water, they force the adjacent water molecules to reorganise into ice like cages that surround the hydrophobic molecules. ...

 why do they use water in baptism

why do they use water in baptism

What does water baptism symbolize? Baptism has long been seen as a symbol of cleansing. Prior to the start of the church, the practice of baptism already existed in Jewish culture as an act or repentance and purification. John the Baptist baptized people as an act of repentance, preparing the Jewish people for the soon-coming Messiah. The followers of Jesus were baptized and baptized others as well. Shortly before Jesus ascended to heaven, He command His followers to baptize people from all nations in the name of the Father, Son, and Holy Spirit as they became disciples of Jesus (Matthew 28:18-20). When the church began at Pentecost, 3,000 people believed and were baptized (Acts 2:41). This practice continued as the church spread from Jerusalem to other locations through the Roman Empire

 why does my scalp burn and itch

why does my scalp burn and itch

Hello Eboshi, I now see your reply, thanks to the merging of my two simultaneous threads (woops, and thank you teacherbear! ). I definitely agree that it seems to be some kind of allergy, judging by the suddenness of it, and by the fact that my scalp is ordinarily very happy. The products I use are very diluted sulphate shampoo and a coney conditioner (I have tried alternatives since becoming an avid reader here but find my current routine gives me the most reliable and pleasing results). I don't perm or colour my hair, but do use cassia and occasional henna glosses. The only hair-based thing I have done differently in the last few days is mix honey with my conditioner, but this was away from my scalp, plus I use neat honey quite happily on my face and have had no problems. ...

 why does my dog sleep a lot

why does my dog sleep a lot

Have you ever watched your dog napping Б yet againбБ and thought, Бmy dog sleeps all dayБ? YouБre not alone. One (of the many! ) awesome things about dogs is that they get to sleep as much as they want. Who can blame them either? We would loveбunlimited opportunities to sleep in! Thankfully, your dog isnБt actively trying to make you jealous with his sleep habits. In fact, itБs completely normal for dogs to spend most of the day sleeping away. Here are some reasons why your dog sleeps so much. According to Dr. Evan Antin, a veterinarian at in Thousand Oaks, California, dogs generally sleep about 12 to 14 hours a day. Dr. Antin points out that how much a dog sleeps depends a lot on this age, breed and activity level. БSome breeds tend to be sleepier breeds. Your French and English

 why we should end the war on drugs

why we should end the war on drugs

It is widely accepted amongst scientists and public health officials that the war on drugs has been a failure, but arguments from science have had little effect in changing international public policy. Could figures from law enforcement, the military and intelligence services, who have firsthand experience of enacting the war on drugs, have more success in changing the minds of politicians? That s the hope of a group of law enforcement professionals I joined earlier this month to visit the British Houses of Parliament. Below are some of the most compelling quotes from their arguments. PCC Ron Hogg: serving police and crime commissioner for the English county of Durham spoke alongside Mike Barton, the chief constable of Durham police force. The pair made last year after effectively

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