![Great tits eat from a bird feeder](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Great_tits_bird_feeder.jpg?itok=aiRpq_-G)
Natural Selection in Your Backyard
STEM Explained
A study on bird feeders and beak sizes shows how an everyday human activity can affect the evolution of another species.
![dung beetle rolling dung](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Dung_beetle_rolling_dung.jpg?itok=1q-E0DEH)
How to Find a Mate When You Smell Like Dung
STEM Explained
Some dung beetles use alternative reproductive tactics to increase their chances of finding a mate. Learn what this tells us about evolution and biodiversity.
![DNA "unzipping"](/sites/default/files/2019-10/DNA_unzipping.png)
How can I obtain a sample of DNA?
Hands-on Activities
Be a biochemist! Learn how to extract DNA from an onion and find out what DNA looks like.
![An artist’s interpretation of gene editing technology](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/gene-editing-technology.jpg?itok=v9CJqTwX)
Genome Editing
STEM Explained
Medical biotechnology allows scientists to make changes to the genomes of living things. What are the pros and cons of having access to techniques like these?
![Damage to DNA](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Damage_to_DNA.jpg?itok=qSvdjV4V)
Radiation Effects on Cells & DNA
Backgrounders
This backgrounder explains the effects of radiation on cells and DNA.
![Ella Harvey | Data Manager at BOLD (Barcode of Life Data System) Ella Harvey | gestionnaire de données chez OLD (Barcode of Life Data System).](/sites/default/files/styles/career_image/public/6277_13.jpg?itok=4p7FtdME)
Ella Harvey
Career Profiles
Data Manager
![Gonzalo Giribet | Professor of Organismic and Evolutionary Biology, Harvard University Professeur de biologie des organismes et évolutionniste, Université Harvard](/sites/default/files/styles/career_image/public/6143_13.jpg?itok=LueexyMd)
Gonzalo Giribet
Career Profiles
Professor of Organismic and Evolutionary Biology