Day: April 18, 2015

What Causes Ice Ages? A New Proposal. Ice ages in the Southern Hemisphere are influenced primarily by sea surface temperature and atmospheric carbon dioxide

Posted on April 18, 2015May 22, 2017 by Sciworthy 146 views

A new international study casts doubt on the leading theory of what causes ice ages around the world — changes in the way the Earth…

When Dolphins Learned to Swim Convergent evolution in land to sea transitions in marine predators across major mass extinctions

Posted on April 18, 2015May 22, 2017 by Sciworthy 133 views

For more than 250 million years, four-limbed land animals known as tetrapods have repeatedly conquered the Earth’s oceans. These…