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CEB has a new Outreach Pageto showcase the STEM outreach work of CEB graduate students!

A species of, a diverse lichen genus being studied by CEB student Joel Mercado-Diaz.

Workshop on lichen identification techniques taught by CEB student Joel Mercado-Diaz to Cuban biologists.

CEB student Laura Southcott studies the genetics of mate preference in Heliconius butterflies.

CEB graduate student Daniel Hooper researches the role chromosomal inversions play in avian diversification.

An opossum prepped by David Grossnickle, who studies the evolution of mammalian jaw morphology. CT image by Julia Schultz.

CEB student Amy Henry at her field site on Tatoosh Island.

Welcome to CEB!

The Committee on Evolutionary Biology (CEB) is a unique interdepartmental and inter-institutional graduate student training program dedicated to the study of Evolutionary Biology. Faculty and students in the program are engaged in interdisciplinary studies at time scales that range from single generations to the entire history of life and at organizational scales from the molecular to the global.


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I am interested in the origin and evolutionary history of mammals during the Mesozoic Era (i.e., the Age of Dinosaurs), which is a geologic span of time from 250 to 66 million years ago (mya). This period encompasses the first two thirds of mammalian history. Traditionally, early mammals were described as small, nocturnal insectivores that managed to survive past the demise of non-avian dinosaurs, subsequently radiating into the wide breadth of ecological niches they now occupy. However, incredible fossil discoveries over the past 20 years have upturned this view and demonstrate that Mesozoic mammals achieved surprising ecological, morphological, and taxonomic diversity before the extinction of dinosaurs. Thus, these study organisms offer a unique opportunity to make considerable contributions to our understanding of mammalian origins and early history.

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Spotlight Archive

David Grossnickle in Montana with a T. rex skull that’s been wrapped in a protective plaster cast.


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Congratulations to John Park, recipient of the Wayne C. Booth Graduate Student Prize for Excellence in Teaching!

CEB graduate student David Grossnickle is interetested in why certain mammal groups have diversified through time and survived extinctin events. In his recent publication in Scientific Reports , David proposes that mammal teeth, jaw bones and muscles evolved to produce side-to-side motions of the jaw, or yaw, that allowed our earliest ancestors to grind food with their molars and eat a more diversified diet.

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Last week brought news that Bitfinex, a leading Bitcoin exchange, lost an estimated $65 million due to a recent hacking incident. Bitfinex has stated that as a result, their users will lose 36% of their funds to make up for the losses incurred by the hack. Bitfinex is only one of the latest targets in hacks against a Bitcoin or online currency exchanges. Bitfinex has stated that they will eventually either reimburse users or offer stock options in their parent company to make up for the loss. Other exchanges have been forced out of business, leaving their users holding the bag. In the wake of the Bitfinex hack, people and businesses are getting concerned about the security and use of Bitcoins and other online currencies. Review Bitcoin security best practices .

Bitcoin is an online digital currency that can be used to trade directly from person to person or from businesses or Bitcoin services like exchanges in order to purchase items. Subway, Overstock, PayPal, and many other legitimate companies accept Bitcoins and there are advantages to the online currency. Bitcoin is the best known online currency, but it’s certainly not the only one. Others include Litecoin, Peercoin, and Primecoin.

How Does Bitcoin Work?

Bitcoins are most commonly purchased using regular currency in “exchanges” like Bitfinex. Bitcoin is a decentralized currency, meaning there is no one holder of all Bitcoins, which sets it apart from banks and other “brick and mortar” financial institutions. If an exchange gets hacked and the losses are substantial, users run the risk of losing either a percentage of or all their Bitcoin balance in an exchange, as could be the case for users of the Bitfinex exchange. Cyberattacks on exchanges occur fairly regularly.

Most users access Bitcoins using a “wallet”. The wallet is a user interface that shows a user’s Bitcoin balance, can create user account addresses, and also contains the secure encryption keys that authenticate each transaction. Transactions are verified by the Bitcoin network and kept in a public ledger which is accessible to all users, sort of like a public bank statement. This ledger is called a “blockchain”. The ledger only shows the account number and the transactions but not sensitive details about the user, such as real name, credit card info or email.

Once a number of transactions have been made the block is encrypted and moves to the next block in the chain. As more transactions are made, new blocks are added to the public ledger, like a chain, hence the name “blockchain”. A blockchain is shared by all users of the Bitcoin network, so it is difficult for a middleman to tamper with a transaction without everyone being able to notice the discrepancy.

Keep in mind, the actual tally of coins or transactions is contained in the public ledger or blockchain and not stored in the actual wallet. Some Bitcoin experts recommend that a unique address should be used for each transaction to ensure the highest level of security. Most Bitcoin wallets will create a new address each time you initiate a transaction.

Why Use Bitcoin? There are advantages to using Bitcoin. Bitcoins can be used in any country. Also, exchanges often do not charge service fees and if they do, such fees are usually nominal. Users can send Bitcoins from person to person, without having to go through a bank or other clearinghouse. Bitcoin accounts cannot be frozen by governmental agencies or other authorities. There is no minimum balance required to maintain an account and no other monetary limits apply. When a user buys or sells Bitcoins or makes transactions using them, the transactions happens usually within 10 minutes. Another perceived advantage of using Bitcoin is that it’s anonymous, but the true anonymity of Bitcoin users depends on several circumstances, such as the wallet used, Tor and information supplied such as a fake name or email account. You do not need to register an account with a particular Bitcoin exchange or give personal details when opening an account.


Hacking isn’t the only danger to using Bitcoin. Like most other online businesses, scammers work in the Bitcoin realm as well. Some better known scams are:

It is critical that when using Bitcoin or any other online currency that you employ a security awareness mindset. If someone offers a spectacularly high return on a Bitcoin investment or very low transaction fee on purchasing Bitcoins, you should be suspicious. As with many things in life, if it sounds too good to be true, it probably is.

Also, realize that when dealing with online currency accounts, you’re not guaranteed any reimbursement protection in case your Bitcoins are stolen. The Bitcoin industry is not regulated like mainstream banks and investment companies are.

As with any other online technology, make sure you educate yourself on the current threat vectors associated with that technology. If you’re a business considering using online currency, make sure you and your employees know what you may be getting into. And remember, there is no way to guarantee that your transactions will be anonymous.

For more information on how to stay cyber safe, check out our comprehensive, Mustang Women’s 11464024 Slip on Trainers Beige Beige VrrqRv
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Bitcoin investment scheme
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