Trilobites achieved their maximum genetic diversity in the Cambrian. However, unlike this diversity measure, the morphological disparity of trilobites based on cranidial outline reached the peak in the Middle to Late Ordovician.
Archaeology
Nov 19, 2020
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521
From the elephant to the mayfly, biologists say there is a general rule about longevity: the bigger the animal, the longer it lives.
Plants & Animals
Aug 20, 2013
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0
At first glance, it's hard to see how a common house sparrow and a Tyrannosaurus Rex might have anything in common. After all, one is a bird that weighs less than an ounce, and the other is a dinosaur that was the size of ...
Archaeology
May 27, 2012
1
1
(PhysOrg.com) -- Scientists in Perth, Western Australia, investigating the costs of brothers and sisters in contemporary Australian society, have discovered that girls with older brothers tend to start menstruation later, ...
Fishing primarily removes larger and more active fish from populations. It thus acts as a selection factor that favors shy fish, as a recent study by the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) ...
Plants & Animals
Feb 23, 2021
0
816
(PhysOrg.com) -- The timing of molar emergence and its relation to growth and reproduction in apes is being reported by two scientists at Arizona State University's Institute of Human Origins in the Dec. 28 online early edition ...
Evolution
Dec 28, 2009
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0
Puberty is the threshold between childhood and adulthood. Behavior and appearance change considerably during this period – not only in humans but also in our closest relatives, the great apes. In a current study researchers ...
Plants & Animals
Jul 29, 2014
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0
The ice is melting, the sea level is rising and species are conquering new habitats. The warming of the world climate has many consequences. In the current issue of the renowned journal 'Proceedings of the National Academy ...
Ecology
Jul 23, 2009
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0
(AP) -- The population of endangered green sea turtles at SeaWorld in San Diego grew by 82 in October when the eggs hatched on Shipwreck Beach without human help.
Ecology
Nov 3, 2009
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0
"Love stinks!" the J. Geils Band told the world in 1980, and while you can certainly argue whether or not this tender and ineffable spirit of affection has a downside, working hard to find it does. It may even shorten your ...
Other
Oct 27, 2010
2
0
