Careers & Internships | Marine Biological Laboratory

First time visit: View without clicking anything

Marine Biological Laboratory | Biological Discovery in Woods Hole

About the MBL | Marine Biological Laboratory

Visit The MBL | Marine Biological Laboratory

Seeing Life Exhibit | Marine Biological Laboratory

Every page should have a clearly defined heading, known as a "H1" (Heading 1).

A `H1` is the main heading of the page. It helps accessibility by allowing uses to
skip to the main content of the page. It helps all users identify what the page is about. 
It helps SEO by giving special emphasis to the topic of the page.

It is not enough to simply include large text. Headings must be coded 
[semantically](https://html.com/semantic-markup/) as `<h1>` tags, like so:

```html
<h1>This is a heading</h1>
```

Note that headings must contain some machine readable text to be considered valid. 
For example, this heading is not valid:

```html
<h1>
    <img src="company-logo.png">
</h1>
``` 

But with the addition of `alt` text, this heading is valid:

```html
<h1>
    <img src="company-logo.png" alt="About Company Inc.">
</h1>
``` 

Generally we recommend you just use plain text for your headings.
See [Technique H42](https://www.w3.org/TR/WCAG20-TECHS/H42) for more details.

missing-h1

October 2025

September 2025

Marine Biological Laboratory

	Title / URL	Issues
	Careers & Internships \| Marine Biological Laboratorywww.mbl.edu/about/careers-internships	1
	First time visit: View without clicking anythingwww.mbl.edu/	1
	Marine Biological Laboratory \| Biological Discovery in Woods Holewww.mbl.edu/	1
	About the MBL \| Marine Biological Laboratorywww.mbl.edu/about	1
	Visit The MBL \| Marine Biological Laboratorywww.mbl.edu/visit	1
	Seeing Life Exhibit \| Marine Biological Laboratorywww.mbl.edu/about/history-archives/seeing-life-exhibit	1

Ensure every page contains a top-level heading

Marine Biological Laboratory

Where this issue has occurred