As­ter­oid that killed di­nos hit with power of 10 bil­lion atomic bombs

The Times of India (New Delhi edition) - - Times Trends -

Sixty-

six mil­lion years ago, life on our planet was go­ing on just as it had on any other day. But in moments, af­ter 180 mil­lion years of pros­per­ity, this ex­traor­di­nary abun­dance of life was all but oblit­er­ated. The as­ter­oid which wiped out the di­nosaurs hit the Yu­catan penin­sula in Mex­ico with the power of 10 bil­lion atomic bombs of the size used in the Sec­ond World War. The im­pact set alight vast wild­fires stretch­ing thou­sands of miles, trig­gered tow­er­ing tsunamis and blasted so much sul­phur into the at­mos­phere it blocked the sun, caus­ing the cat­a­strophic global cool­ing that ul­ti­mately doomed the di­nosaurs. Now, a new study led by the Univer­sity of Texas at Austin has con­firmed the the­ory by find­ing hard ev­i­dence in the hun­dreds of feet of rocks that filled the im­pact crater within the first 24 hours af­ter im­pact. Lon­don: Sci­en­tists have found why many peo­ple strug­gle to keep their weight in check as they get older, even if they don’t eat more or ex­er­cise less than be­fore.

The study, pub­lished in ‘Na­ture Medicine’, found that lipid turnover in the fat tis­sue — the rate at which lipid or fat in the fat cells is re­moved — de­creases dur­ing ag­ing and makes it eas­ier to gain weight.

The re­searchers at Karolin­ska In­sti­tutet in Swe­den stud­ied the fat cells in 54 men and women over an av­er­age pe­riod of 13 years.

In that time, all sub­jects, re­gard­less of whether they gained or lost weight, showed de­creases in lipid turnover in the fat tis­sue. Those who didn’t com­pen­sate for that by eat­ing fewer calo­ries gained weight by an av­er­age of 20%, ac­cord­ing to the study done with re­searchers at Upp­sala Univer­sity in Swe­den and Univer­sity of Lyon, France.

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